Okay, I know this is an old topic, but I've got to share my experience:
We used my friend's bong. I had some afghan kush, and he had some good schwag. (oxymoron, I know

)
Well anyway, it was the 4 of us. We smoked the kush first. I smoked three bowls of it, and started to feel tingly and warm all over. Then, while they were high as shit, I smoked 4 bowls of the schwag. I was FUCKED UP.
When I lay back on his couch listening to Floyd, it was like some invisible barrier was pushing me forward, and my muscles were tightened as hell, and I was just relaxing. It felt so great.
I felt literally stoned, like I felt like a stone and didn't want to move at all. But, I managed to, and I mooned all of them in the room, and we broke out laughing, rolling on the floor for about 10 minutes. It was hilarious.
That was the most incredible experience. Ever. I can't wait to do it again. ;D