Ages ago on the upper deck of a PMNW 747, we has two FAs: one who did all the work and one who spent all his time trying to entertain us with his comedian routine. He said that he did work in stand-up and that was clearly the job that he loved, although I didn't think he was very good. I felt sorry for the other FA who did her best to give good service and ignore the jerk. IIRC, I wrote in a comment on what had been happening.