Waterbed Practical Joke, Funny Video. This is one of the best practical jokes I have ever seen. I love this stuff. The thing I love the most is that there is no help. The people doing the video do not come out and help the people out of the ” Water Beds ” The two girls at the end have quite a time getting out. This is a goodun. It is at 9 million Youtube views. Please enjoy this, Waterbed Practical Joke, Funny Video.