If you let the game play through a song without touching a button, it has a 50% chance of playing a music video of the song Mezcal Head by DUEL.
If you want to get off your bike without crashing first, just reduce your speed to under 10 mph, then hold L + R and press Up on the D-pad.
Remain idle at the Der Panzer Club while the game plays through a complete song. The music video from "Jessie" will appear.
If you let the game sit while you are in the Der Panzer Club, after it plays through the entire song, it will load up a music video called, Jessie.