When surprising Master P for his birthday, fans should take note the rapper will not be pleased with a flash mob. A group of flash-mobbers found this out the hard way, when they surprised P on his birthday at the restaurant he was dining at with his son Romeo.

TMZ reports that a flash mob broke out right in front of the restaurant P was eating lunch at yesterday. The artist was not impressed by the whole thing, which included dancing to Psy's "Gangnam Style."

During the performance, Master P and friends got up and left, while a woman chased after him, begging him to stay. She told him it's a birthday present from someone (the name of which is not understood), but Master P was not returning to the flash mob, and kept on walking. Eventually the lady backed off.

Check out all the footage from the incident caught on tape below.