Another time (this one is a bit of a doozy) in Spanish 1 for my freshman year I was asleep (as I was every day I was in that class) and, well, you know how sleeping in school is different than regular sleeping? Like your on the fringe of conciousness and you are aware of the sounds and lights around you but you're still dreaming.
Well I was in this state, and in my house growing up, my dad built the ultimate-gaming room for me and my brother. It was sound padded but the other way around. We couldn't hear anything outside of the room, but everyone from the outside could hear in the room. My dad would always resort to having to yell at the top of his voice from the first floor (the room was on the second floor) and I would, in turn, yell at the VERY TOP of my lungs to respond.
Well appearently in this dream my dad or someone else was calling me and I was appearently in this room and just as I began to go into the full state of dreaming...
I yelled at the VERY TIPPIDY TOP of my voice "YYYYEEEEEEEEEEEAAAAAAAAAAAHHHHHHHHHHHH?!?"
It was so loud I woke myself up, I rubbed my eyes and looked around. EVERYONE in the room was turned facing me, wide-eyed and everything was completely silent, everyone was taking a test... and then everyone broke out in hysterical laughter.
My teacher screamed bloody murder "Are you alright?!?"
"Yeah, I'm fine. Why did I do something?"
More laughter and my friend in front of me turned from having his head to his desk in laughter and said "DUDE! Did you do that shit on purpose?"
"What?"
"You just screamed like hell dude!"
I immediately broke out in laughter and explained what happened.
Long-story short I got moved to a different (but luckily better) classroom.
For the rest of my freshman year, anyone who knew from that class when they walked by would yell "YAAAA!" at the top of their voice.