Weird experience at gamma phi?

I was talking to this active at gamma phi today and all of the sudden she stopped talking, started peeing on the ground, and then collapsed. THEN she contorted her body so she was walking on all fours backwards and I swear her head spun all the way around… she crawled up the wall and was crab walking on the roof and out of the door but not before she spit at me! I was so scared I ran out of the house. Did anyone else experience this?