Very great entry! I really loved at certain points, just like intended (I hope! ;D) Nice idea of 'completely changing' the art style for putting in the joke...This works quite well! Although at certain points it would have been nice if the art was consistent. Some things are much more detailed than others for instance.
The theme fits definitely, as the hero is literally 5 seconds too late... Pacing is great, although I was kinda confused by the elevator scene (?)
Overall: Very good work!