SPOTTED: 10/21/17 Thriller Flash Mob

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)

Zombies showed they still know how to shake it at the 6th Annual Thriller Flash Mob in Old Town on Saturday, Oct. 21, 2017. (Jared Gase / Jared Gase)