Yea that used to happen to me a lot when I used to snort an ounce of coke a week. Its a very terrifying experience when you cant move at all, Once I dont know if I was dreaming or what buy I had sleep paralysis but fought it and struggled to get up, then out of bed and finally made it to my living room and there was this god like but threatening presence and then after screaming at to leave my house for what seemed like hours i collapsed on the floor. Really was a weird experience and reason enough for you kids out there to not do hard drugs especially mass quantities and mixtures.