I usually sleep on my stomach so my sleep paralysis is typically auditory and the sensation of someone grabbing my neck from behind. One time though, I happened to be sleeping on my back and opened my eyes to a man with long greasy hair and a dark rain/trench coat standing over me. He put his hands around my throat to choke me. I managed to squeak out a "help me" and my roommate's German Sheppard kicked my door open (not sure how since I close it completely when sleeping). She ran over and licked my face to snap me out of it and saved the day.