I don't know why these balloons are funny. I'm laughing as hard watching these videos as I was that day when we were outside letting the balloons squiggle around in the air. It may be because they look like a giant dong and make funny noises as they get flaccid. Maybe it's because we had a couple of drinks, we were bored and everything was funny. But I'm sober right now (scout's honor!) and it's still funny, so I'm gonna go with the first one.