Police are searching for a grinning manspreader who allegedly punched a straphanger in the face this week for daring to confront him over the infamous subway etiquette violation.

The NYPD says a 59-year-old man was sitting on a Manhattan-bound M train at Northern Boulevard on Wednesday morning when the aggressive spreader made physical contact with the victim's legs. "The victim asked the unidentified male to move his legs and the unidentified male punched him in his face," an NYPD spokesperson said.

The victim was left with a cut on his nose and broken glasses. The assailant remained on the train after the attack, police said, presumably spreading ever wider and wider, until his knees burst through the emergency doors on either end of the train. He is believed to be around 5' 9" and 150 pounds, and was last seen wearing a black North Face and black hat, looking very pleased with himself.

Yet another reminder that manspreaders are, by their very nature, a petty, defiant, and often violent lot. We may talk a lot of shit from behind our screens, but it's important to take caution while confronting the scourge—enforce spread etiquette at your own risk.