I saw this street performer in Pai, Thailand. He was "practicing" as he does every day on a busy street full of motorcycles scrambling tourists and stray animals. It must take some serious concentration! He told me he can balance five on his head and was working for the sixth.
http://www.youtube.com/watch?v=AhFc3cJY_j8
I put the video on youtube, it takes to long to load it on this page ;)
