Dave's utter confusion and frustration over essentially just passing around a piece of paper from one person to the next in order to settle a chain of debts. Oswidge then explains everything in song. While everyone stands around wearing some of the most hilarious WTF expressions in the history of animation, for bonus points.
Steve the Egg, Steve the Egg How'd he wear pants without no legs? Steve the Egg, Steve the Egg He woke up next to sausages!
Ned's zipper gets the power to let him travel through time after it's hit with every super-power origin cliche in the book: struck by a comet, zapped by an experimental laser, doused with mysterious chemicals, struck by the power of the Norse gods, bitten by a radioactive grasshopper, and "taught the arcane ability of how to cloud men's minds by an inscrutable monk".
Ned: Wow, that hardly ever happens!
After Ned travels through time, it cuts to Udrogoth, where Dave and his family are literally just standing around, waiting for their story to begin.