Stealth Pun/Web Animation

One of the guests at Donkey's funeral in Weebl and Bob is a giant ape. Chris identifies him as Donkey's father ("He doesn't like to talk about it."), but the character's name is never mentioned.
Occasionally done in AMV Hell. For instance, the first clip in the third collection is Grenadier, an anime where women reload pistols with their cleavage, coupled with the instrumental opening to Nightwish's "Dark Chest of Wonders".
In this video, which recreates the infamous Faces of Evil! intro, look at what the Soldier is drinking before he says "This peace is what all true warriors strive for!". It's Jarate, Peace and Piss have a very similar sound, so it may or may not have been intentional.
One of the Fight Scene episodes animated by Monty Oum in Red vs. Blue: Revelation is named "This One Goes to Eleven". The episode is Chapter 10, showing all the events in the series that lead up to Chapter 11.