http://www.youtube.com/watch?v=0TP3HwbCHBY&feature=related

Ted's impromptu proposal live on air to Georgette on an episode of Mary Tyler Moore—and then his immediate regret—has left a lasting impression...

http://www.theatlantic.com/entertainment/archive/2011/03/great-proposals-in-sitcom-history-from-cheers-to-the-office/73053/