Horrific video shows nearly 40 teens viciously attacking off-duty Marines on Calif. beach

Shocking video has captured a mob of up to 40 teens viciously beating a trio of off-duty Marines who say they’d merely asked them to stop lighting fireworks on a California beach.

The now-viral footage shows the Marines — enjoying time off for Memorial Day weekend — being followed by the baying mob while walking toward San Clemente Pier Bowl late Friday.

“We told them we were Marines so they would leave — but they didn’t. They just kept going at it,” one of the attacked servicemen, Hunter Antonino, told KCAL News.

As they start walking up some steps, some in the group behind yell for them to “get the f–k outta here” — before one runs up from behind and sucker-punches the trailing serviceman.