This glitch likely occurred during the production phase when syncing mouth movements to dialogue layers. Key Plot Features

For about five seconds, Paulie appears to be talking through his belly.

If you are looking for the primary narrative features of the episode:

In , titled "Gum-Gum Human vs. Fire-Breathing Cyborg!" , a notable "feature" is a famous animation error involving the character Paulie . The "Belly Mouth" Animation Error