In the "Let's Play" Happy Wheels episodes, one level, "It Keeps Happening!" tormented Nova to no end, and he eventually had to give up and move on. For the 100th episode, he tries the level again and FINALLY beats it. What makes it so awesome? After dying so many times in the previous videos, he manages to beat it on the FIRST TRY.
In the same video, he replays another level that he never finished. He beats that one on the first try as well.