i get those every now and again, and i'm 17. most of the time its because of drugs in my system. and no i dont meen heroin or coke i mean hell powerfull painkillers, i'll take four and go to bed, then half way through the night wake up and sit in the corner of my bed and sit there till damn fearing sleep. and its a *****, cos the drugs make you halucinate, so you THINK its all real and cant just think "yes mate, Jasons not real, Pinheads ficticous, Zombies are only in movies, go to sleep." sucks ass