The whole sequence when the gang is drifting to Democratus. Most especially the end, after everyone's gone stir crazy:
Grumpos: You left a sock over there... Over THERE... Is it too much to ask that you clean up after yourself?
Boots: What? I was going to pick them up tomorrow.
Grumpos: Tomorrow? Tomorrow? You son of a—
Grumpos starts to hit Boots with his cane, camera cuts to Rho as sounds of a fight continue offscreen.
PAL: Should we stop them, ma'am?
Rho (deadpan): Let 'em kill each other.
Apparently, Grumpos' plan to teach Boots not to leave his socks lying around involves shoving one in his mouth.
Grumpos: Eat it! Eat it! Eat it! EAT IT!