Found this while surfing youtube. Check it out. (Last trick at 1:00, boin-e-boing variation, is my favourite. ;D)
http://www.youtube.com/watch?v=z0AhIz2hwS8&feature=related
r you talking about the over under boingy boingy its the same thing but between the fingers its really hard
Yah, just looked really cool. 
oh found another one, great for showing all the styles of play.
nice hes really good
Yah, and in all of the styles too. ;D
Cool videos.
the first video the guy looks like john ando and a bit of yoshi