Back Up a 3-Iron

Arnold Palmer is playing in a big tournament and comes to a 235 yard par-3.
After some deliberation, he takes a big swing with his 3-iron, sails the ball 20 feet over the pin and backs it up to within 3 feet of the pin.

A fan in the crowd said "Mr. Palmer, how do you make a 3-iron back up like that?"

Mr. Palmer replied, "Do you own a 3-iron?"

The fan said, "Yes, sir, I do."

"How far do you hit it?" said Palmer. About 160 yards was his reply.

Palmer calmly said, "What the hell do you want it to back up for?"