If you get into trouble while wearing a "Make America Great Again" cap you know what they're gonna say.

That was was on display on Sunday as bystanders chanted "Lock him up" after a man wearing such a cap clashed with passengers and crew on a flight that was preparing to leave Shanghai.

According to an account in The Washington Post, the man took a seat and refused to let others sit in the row.

The Post wrote that a video, which is going viral, "shows him leaning back in his seat -- hands folded behind his red hat, feet propped on someone else's arm rest -- while a woman in crutches and many others stand in the aisle, snap photos and glare."

The Post account, published Monday afternoon, said it was unknown who the man is and if Chinese authorities charged him with a crime following his removal from the flight.