oh god, my roommate would not shut up when I was trying to answer this.
I'd run away, because they'd be able to kill me pretty easily. :( I'm small and not very strong, and don't know how to defend myself.
If possible, I'd go find a way to break them free of their possession. I don't know how I'd do this, but I'd find a way! Hopefully... Probably not. But I'd try!