Imagine you have been swimming and have manged to get some fluid trapped in your left ear. Now, find a Japanese person and ask them the best way to release said fluid.
Chances are, he or she will tell you that you will need to stand on your left leg, while holding your right hand above your head, lean to your left, and then hop until the fluid is cleared.
Amazingly, and despit the ridiculous feeling one gets while trying this method, it works. Well.