Teen thug points gun in face of Marine Corps veteran, demands his car keys. But punk definitely picked wrong victim.

A teenager was caught on surveillance video pointing a gun in the face of a U.S. Marine Corps veteran and demanding his car keys in Maryland earlier this week, but things didn’t work out so well for the punk — or his three friends.

Jheyco Borda — who was trained in hand-to-hand combat while in the military — told WTTG-TV he was working on his pickup truck near Oxon Hill High School around 4:30 p.m. Wednesday when four teenagers approached him on the sidewalk.

‘Once a Marine, always a Marine.’

Borda told the station the suspects — all of whom were dressed in hooded sweatshirts — approached him and demanded his car keys, phone, and other valuables.

WTTG said surveillance video showed one of the teens — dressed in