A dolphin video in the water.

Whether it is a dolphin in the wild or a dolphin in captivity you can not get over the sleekness of this creature. To go through the water with a dolphin's build is effortless and agile. Also kind of looks like fun. I don't think a human can get an airborne three kick-back flip at any level. Maybe with rockets and years of swimming training and even then doubtful. And it won't look natural with the rockets and all that.