One of the comments listed my favorite, the Landmaster armed vehicle from the otherwise forgettable flick Damnation Alley.

Keeping the seat and lid down also helps keep the spray from flushing spread around.

They didn't include MY favorite:
http://www.youtube.com/watch?v=F3_QDHabaNM

Some of the New Zealand extras playing Orcs in The Lord of the Rings started doing this sort of dance as a time-killer, and a version ended up appearing on-screen during the Battle of Helm's Deep.

May as well plug my own, http://www.mansionofe.com. Ones I enjoy consuming are Girl Genius (http://www.girlgeniusonline.com/comic.php) and Schlock Mercenary (http://www.schlockmercenary.com/)

"I don't get this. Is Blernsball the exact same as Baseball?"
"Baseball? God forbid!"
"Face it Fry: Baseball was as boring as Mom and apple pie. That's why they jazzed it up."
"Boring! Baseball wasn't.. Hm. So they finally jazzed it up?"
-Futurama

In his autobiography, Campell recounts how the shirt he wore as Ash became so coated and caked with fake blood, it literally shattered.

Maybe it doesn't qualify for nerd-dom, but Pennywise from Stephen King's It deserves a mention.

Twinkies will still be made. They'll just be churned out by a different corporate entity using lower-paid workers, while the corporate looters who ran Hostess into the ground walk away with their profits.

I've been Robert all along; my parents fought to keep my name from being shortened when I was a kid, and I stuck with it.

Suppose it would have ruined the mood, but still a pity they didn't work in a clip from "Airplane!"

The "new teeth" bit was one of the first things Tennant's doctor said.

DC did this to attract some free publicity, and look, it worked! A few months down the road, they'll push the reset button, and he'll be back at The Planet.

The irony is, real-life hippos are actually quite bad-tempered, territorial and dangerous; I've read that every year in Africa, they kill more people than any animal except mosquitoes. They really do overturn boats and attack the occupants. And if they just want to give you a warning, they don't roar at you, but.. cut loose from the other end.

I'd add George Hamilton to the honorable mentions for his comedic turn as the count in Love At First Bite. Despite his being the suntan king, it may be the high point of the man's career.