On Seinfeld, Susan was the person who punctured the Bubble Boy’s bubble. The moment occurs in “The Bubble Boy,” when George gets into a fight with Donald, the immunodeficient fan living inside the protective bubble.
George is often remembered as the culprit because he starts the confrontation and is blamed for the danger that follows. However, Susan is the one who actually attacks the bubble while trying to stop the struggle and free George. Her action causes the bubble to deflate, making her the precise answer to the question.
“The Bubble Boy” is the seventh episode of Seinfeld’s fourth season and originally aired in 1992. The episode’s plot combines a disastrous road trip, a cabin visit, and a chaotic Trivial Pursuit dispute. Its joke depends on the audience recognizing the gap between who appears responsible and who actually punctures the bubble.