youre walking alone on Halloween, trick or treating on the houses as you pass

You decide to go into a big dark alleyway, just for the fun of it, when you hear a dark and creepy voice behind you say:

"Did you know.. that your skin is your biggest organ?~"

Its your anatomy teacher mrvelseb

"Im just playing with ya! You know.. you shouldnt be walking alone in dark allyways.. you never know what... Creeps... Could be lurking there..."