A bouncer at the Harp on Causeway Street is on the lam following an incident last month in which he reacted to being urinated on by knocking out the guy who did it, police said today.

At a Boston Licensing Board hearing this morning, District A-1 officers reported they responded around 12:15 a.m. on July 29 to the Causeway Street bar, along with Boston EMTs.

According to police, an "extremely intoxicated" man was in one of the bar's corners, his penis out as he relieved himself. A bouncer went over to make him stop, but that proved easier said then done - he turned the man around and the man just kept going, all over the bouncer's pants. The bouncer then connected with a single, solid punch, making the man crumple to the ground, police said.

When officers arrived, the bouncer had fled, telling other workers he had a warrant out for his arrest, police testified, adding that he was correct - the bouncer did, in fact, have an outstanding warrant for assault. He has not been seen since.

Bar attorney Dennis Quilty said the incident was unfortunate, but said the bar manager and other workers acted appropriately - they were the ones who called 911. There was, he said, no way for them to have known the bouncer would react like that.

The alleged micturator attended the hearing and testified that yes, he was intoxicated that night. In fact, he said, he was so intoxicated, he doesn't remember anything from that night - including urinating on the bouncer or getting punched by him.

The board decides Thursday whether the bar could have prevented the incident and, if so, what punishment, if any, to apply.