...he wasn't even good at it!
I remember a few times when he was on a show with a sceptic like James Randi, suddenly all his "supernatural powers" left him.
I remember Randi saying "If he's doing it by the power of his mind then he's doing it the hard way" as he proceeded to show the cheap tricks that spoon benders use.

Funnily enough, I saw him being interviewed by Andrew "Brillo Pad" Neil a good few years ago now, and Geller proceeded to do some "supernatural" stunt with making a compass point in unnatural directions.
It was so obvious what he did with a hidden magnet in his belt but Neil fell for it hook, line and sinker and was very, very impressed.

Despise Geller.