Forget something?

A dopey ex-con with a loaded gun in his luggage at JFK Airport was in such a rush to get away that he left his wallet and Nikes at the checkpoint, authorities said.

“Oh, s – – t!” exclaimed Junior Antonio Almonte, 31, after a TSA agent asked him about a 9mm Beretta spotted on an X-ray.

He had already taken off his Air Jordan sneakers as part of the screening process for a flight to Puerto Rico.

Asked about the heater, Almonte suddenly bolted in his socks through the terminal, sources said.

He later surrendered.