A teenage bodybuilder has been crushed to death while trying to stop a minivan from rolling into another car in Brooklyn.

Mousa Alijahmi, a freshman at the College of Staten Island, was working as a restaurant valet when he died Saturday afternoon.

Police said the 17-year-old student had just parked the minivan and stepped out when the vehicle started rolling — apparently because he had not put it in park. As he ran behind it, the more than 3,000-pound van knocked him into a parked SUV, crushing him. The teen died at a hospital.

Alijahmi's family had immigrated to Brooklyn from Yemen.