I was reading Ian Frazier's article about meteorites in the current issue of The New Yorker when this word caught my attention in the lede:
Frazier uses it in describing our reaction to things that fall from the sky: "... we horripilate at the uncanny scent of our beginnings, or end."
I looked it up. "Horripilation" (the noun) is the name for what happens when your hair stands on end and you get goosebumps. "Horripilate" is the verb.
Just think of how you can add this to your vocabulary: "That movie was so scary I horripilated." People will think you are either very sophisticated and erudite, or very weird.