Vinny Guadagnino makes the fist pump look easy on 'Jersey Shore,' perhaps deceptively so. Guadagnino stopped by 'Good Day New York' (weekdays, 9AM ET on Fox) to talk about how he became a 'Jersey Shore' star, and to teach anchors Rosanna Scotto and Greg Kelly his signature dance move.

Guadagnino, who's actually a Staten Island native, decided to pass up law school to enjoy the show's success. "I want the degree, yes," he said, "but right now, I think I'm doing well." Scotto asked if Guadagnino was aware of his fifteen minutes of fame fading. "My fifteen minutes started an hour ago," he said. "This was a phenomenon and it was more than I think fifteen minutes. It took off to five seasons."

It's not a 'Jersey Shore' interview without a Snooki reference, and Guadagnino defended her reputation against charges that she was "rude, profane, self-indulgent, and obnoxious." "She makes her mistakes but at the end of the day, I think she's a pretty sweet, genuine girl," he said.

Scotto and Kelly wanted to sign off with the fist pump, and Guadagnino encouraged them to do it with him. Kelly needed the most instruction, pumping his fist in the wrong direction as if he were churning butter or trying to get a trucker to sound his horn. "Got to work your way up to the top," said Guadagnino, giving pointers. "There you go. No, no, up in the air, not down. There you go, perfect." It's not as easy as it looks.