I searched this here, and didn't find anything; thus, there may be those who haven't seen it -- it's quite an eyeful:
I happened upon it during a math video tour of youtube. BTW, for those not aware of the Numberphile channel (from the University of Nottingham), here's a little video that will keep you up nights:
I happened upon it during a math video tour of youtube. BTW, for those not aware of the Numberphile channel (from the University of Nottingham), here's a little video that will keep you up nights: