My buddy had gotten some front row seats at a comedy club, and during his set, the comedian says "I just turned 50. Which is concerning because I had a midlife crisis at 25." There was very little reaction from the crowd. As the comic gathered himself to continue to the next bit, I said "OHHH, it's a MATH joke!"

He gave a little chuckle, smiled and said, "yeah, a math joke."

I gave myself a gold star for making the comedian laugh at his own show.