The entire 4-game sweep of the Philadelphia 76ers over the Los Angeles Lakers in the 1983 NBA Finals. Philly hasn't won a title since that epic run of greatness. The best team in the '82-'83 regular season proved to be unbeatable in the playoffs as well.
Game 2. Game 3. Game 4. As usual, this is a situation where you never know how long these entire game clips will survive on YouTube. So enjoy now while you still can.