Stanley smashes Michael’s car with a lug wrench in “The Office.” The incident occurs after Michael accidentally exposes Stanley’s affair with Cynthia to Stanley’s wife, Teri.
The storyline unfolds in the season 6 episode “Gossip.” Michael hears that Stanley is spending time away from work and starts spreading rumors, initially treating the situation as office gossip. While trying to explain himself to Teri, Michael repeatedly calls her “Cynthia,” revealing the affair without meaning to.
Teri realizes what has happened, and Stanley reacts furiously. Michael watches from the office window as Stanley attacks his car with a tire iron or lug wrench. The scene is often confused with other car-damage jokes in the series, including Michael’s accidental damage to Stanley’s car and Dwight’s watermelon landing on it during a safety demonstration.