Dr. Robert J. Trotter.

I held a heavy key between my thumb and forefinger. The key began to bend – too slightly to be perceptible – after Geller rubbed it lightly with one finger. The key was then placed on the desk and it continued to bend slowly for several minutes until it reached about a 20-degree angle. There was no obvious way the key I supplied could have been switched. Geller had no chance (by slight of hand or other trickery) to bend the key by force. And he didn’t have a laser up his sleeve, as some have suggested.

Dr. Robert J. Trotter. Science News vol 104 USA.