I enjoy it when an otherwise talkative cartoon does an episode where there are little to no dialogue. Dexter's Laboratory did that a few times, SpongeBob did it once back in season 1.
As a finale for the third season of Rocko's Modern Life, they decided to do just that. There's no dialogue at all in this episode except for the announcer in the beginning; the entire cartoon is told visually. Rocko is in the top of my favorite TV cartoons list and this is one of the reasons why.
I'm looking forward to seeing this on DVD when Shout! releases season 3.