A cop making a public urination bust at a Brooklyn subway station ended up arresting the transgressive tinkler for packing heat.

The NYPD says plainclothes cops in Transit District 32 were patrolling the southbound platform of the Franklin Avenue subway station just after midnight yesterday when one officer spotted a man "standing along a restricted area of the far end of the platform, three feet past a 'Do Not Enter or Cross Tracks' sign." The officer, Jacobo Rosario, approached him when he was finished. According to the NYPD:

When questioned as to his actions, the suspect stated that had to urinate and couldn’t hold it. Officer Rosario placed the male under arrest and during the course of frisking the suspect a .45 caliber Smith and Wesson MP firearm was recovered from the suspect's left side waistband area. Additionally, a firearm magazine containing nine hollow point bullets was recovered from the male's left front pants pocket.

Lixence Exavier, 28, was charged with criminal possession of a weapon, criminal possession of stolen property and criminal trespass.