Seinfeld Moments That Were Completely Improvised

Episode 6 of Season 3, "The Parking Garage," has become known as a classic for the entire realm of situational comedies. In the episode, the group faces a dilemma known all too well to anyone who's ever parked in a garage. After purchasing a new air conditioner at the mall, Jerry, George, Elaine, and Kramer head back to the car only to discover they can't remember where they parked. Each of the four friends experiences their own assortment of mishaps and shenanigans until they finally find the car hours later. Exhausted — both in the show and on set, according to the cast in a Season 3 DVD interview — they get in the car, ready to drive off.

In the previously mentioned interview, David reveals the original scripted ending had the group driving out of the garage, followed by the rolling credits. However, in an unplanned turn of events, the car wouldn't start. "When that car didn't start, I knew instantly we had a blow," Michael Richards says. The mishap couldn't have been a more perfect ending to one of the show's most notable episodes. In fact, if you look closely, you can faintly see the cast breaking character inside the car as they try to hold in their laughter.