Make it three times.  It sounds like the same guy that was on the Oprah show
a while back.  I remember seeing the bit where he was outside and a group of
people crowded around him as he levitated off the pavement (or sidewalk for
all you americans).  Looking back on it I still say "how the $#*& did he do
that?"  He also did a few card tricks and slight of hand.  The person in
question was a young african-american bloke, I would say in his mid to late
twenties at the most.  You have to admitt, if it was a real ability that he
had then what better way to make a living!  It would also make it a
nightmare for those people looking for the wires!
Then again he could just be a really good illusionist.
Matthew.