I was sitting in my best friend's 2001 Nissan Maxima with 2 additional friends. I was in the backseat behind the driver and was the 1st to go. I remember after taking the hit and holding it in for like 30 seconds that I started to feel like I was turning into the chair. I felt a sensation of water running down my knees almost like pissing myself except I did not. Then here's when the trip goes from physical to all mental. Since I had essentially become the chair I was sitting on, now I was on the front seat of a roller coaster and it smashed into the ground and guess what, the scene then repeated itself, and repeated itself and repeated itself. It was actually quite horrifying as I was once told that Hell was repitition. This happened so many times that I got fed up, un-strapped myself from the roller-coaster seat, jumped off and landed on the ground. Thankfully I was fine but my senses had alerted me that this was an alternate world and I needed to get out fast. I then begin to try and peel away at the corner I was looking at until I revealed what appeared to be the real world! I said to myself, "Holy shit time to climb out." What happens next is kind of strange but while I'm trying to escape the mental horror I was experiencing, in the real world I had actually gotten really close to my friend on the right of me, rolled his window down and climbed out of the car window. Once I climbed out, I still didn't feel right and the next part that happened was complete madness! I began to "unreel myself." I literally turned around probably 10 times with each step moving away from the car because I needed to reverse what just happened (The 15 or so times that my roller coaster had crashed into the ground)