Hehe, my cousin was sleeping on my bed one night, and my dads a trucker so he has one of these things called a "Screaming Meanie". Basically, it's an alarm clock for when you absolutely have to get up. It's louder than hell on it's lowest setting, and skull splittingly loud on it's highest. I set it on high, and then set it to go off in about 5 minutes, then left it under some light clothes in my room where my cousin was. I forgot about before the 5 minutes were up, (was stoned), and when it went off it was loud enough to make me jump from the other end of the house. Look on his face running down the hall, priceless.