An observant ATM user from Long Island stopped a scam that could have cost him and other customers their cash.

Kevin Ferraro, a UPS driver from Freeport, was headed home Sunday morning when he stopped to withdraw some money from a Capital One bank ATM in Valley Stream.

Ferraro felt his card stick as he slid it into the machine and grew suspicious.

“Just before I put my code in, I said, let me check out this ATM because, you know, you hear stories on the news. And as I went to wiggle where you put it in, it was loose and I pulled it right off in my hand,” Ferraro said.

What Ferraro pulled off, Nassau police confirmed, was a so-called ATM skimming device. Thieves had taped it to the ATM to steal information from customers’ bank cards. Ferraro photographed it with his phone before handing it to police.

There was “a lot of technology in it,” said Ferraro. “USB port, scan disc — everything to store a lot of information.”

Investigators also found a camera hidden in the ATM. It was placed there to record customers’ pin codes as the numbers were typed in.

“I couldn’t believe it,” said Ferraro.

Luckily, Ferraro’s quick thinking prevented him and others from actually becoming victims. Nassau police are now examining the skimming equipment as they hunt the thieves.

According to a spokesman at ADT Security, ATM skimming is one of the nation’s fastest growing crimes, costing banks about $1 billion a year.

READ MORE: NBC NEW YORK