It's like smushing a balloon by sitting on it. Next, jump up a bit and land on the blanket-covered balloons. Some people prefer this because it doesn't hurt as much as doing the same thing on a concrete floor. Like scaring people, there are many ways of frustrating people. I find out most of this stuff because they always happen to me.
People can be so cruel.
Anyway, read on to find out how to annoy the living- well, just read on. If your victim likes playing games on the computer or often uses the CD-ROM drive, it's fun to put 2 CDs in the drive at once when they don't notice. Put any old CD at the bottom and put the CD they use most on top. I accidently did this once when I was going to play Warcraft2. I opened the drive and made sure it was in there.