The Toymaker.

[MartyS (Gromit)]

Wow, while the Alcohol short wins for pointing out the obvious, this one has to win the "most preachy" award.

Sure seems like it was trying to slip in a religious theme while trying to teach tolerance.

A few good riffs, but I think the short itself overpowers most of them.   

[eegah]

This is the first short that compelled me to shout obscenities at the screen.

Edit: To clarify, the obscenities were directed at the short, not the riff.

[Kenotic]

Any short where they make fun of Animal Collective is fine by me.