What is Spooky Scary Skeletal System?

Sends small skeletal muscle movements down your vertebral column

Me: Spooky Scary Skeletons!
Science Teacher: What's that?
Me: Oh... Spooky Scary Skeletal System!
Science Teacher: Sends small skeletal muscle movements...
Me: Down your vertebral column!

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Spooky Scary Skeletal System - video