While it may pay to know your enemies, it’s also good to know the difference between your friends and complete strangers.

A 32-year-old found this out the hard way on Tuesday when he was beaten to a pulp after slapping who he thought was an old buddy of his over the back of the head.

The “friend” turned out to be a local gangster who didn’t like the attention and summoned his cronies to administer a beat-down. Police arrested two men but are looking for more. Deum Ampil