Sometimes an actor will stumble on the joke, and I'm right on them. Back it up before the audience hears the bad version of the joke, because humor is 90% surprise. If they know what's coming, they won't laugh as hard.

In this quote, James Burrows discusses the mechanics of humor in acting, particularly in relation to timing and surprise. He explains that sometimes an actor will inadvertently "stumble" on a joke, and when that happens, it’s important to quickly "back it up" or correct it before the audience hears the joke in its imperfect form. This is because surprise plays a crucial role in humor—if the audience already knows what’s coming, the comedic impact is significantly reduced.

Burrows emphasizes that humor is about maintaining an element of unpredictability, and surprise is key to keeping the audience engaged. If the audience anticipates the punchline or outcome, the joke loses its punch. This is why the timing of a joke is so important—if the surprise is revealed too early or too late, the audience may not respond as strongly. The "bad version" of the joke he refers to highlights how even small mistakes or premature reveals can deflate the potential humor.

The quote also speaks to Burrows' deep understanding of comedic timing and its relationship to the audience's reaction. As a legendary director of sitcoms, he has mastered the art of creating comedic moments that are both well-structured and spontaneous. His approach highlights how small adjustments, such as correcting a stumble before it becomes noticeable, can enhance the delivery and overall impact of a joke.

The origin of this quote likely stems from Burrows' extensive career in television direction, particularly his work on iconic shows like Cheers and Friends. Known for his meticulous attention to detail and comedic timing, Burrows’ insights into humor reflect his years of experience in shaping how comedy is delivered on screen. His focus on surprise and timing underscores the delicate balance required in successful comedic performance and direction.