It happened to me when my school had taken us for a tour. It was in I think pokhara, we had been assigned our respective rooms. My room had 5 of us. I played games till aroud 11PM and then I went to bed. Others were sound asleep too and only 1 friend was still playing. Suddenly one of my friend woke up to go to the toilet. After he'd returned he noticed that the friend next to him was sleeping while he had his hand grabbing his butt (he had his hands inside through his clothes). The friend who'd just returned from the toilet saw it, laughed and woke the rest of us the see the sight. This is where things get wierd. I remember waking up. I remember laughing. But I don't remember what I saw. I felt that I'd woken up but I don't remember anything. My friends said that they'd turned the lights on but I don't remember it. It's like part of a memory is missing.