Duke Nukem 3D Easter Egg - Beavis and Butthead Homage

In one level (I forget the name), Duke explores a fast food resteraunt. (It's a sick joke that there's a secret entrance between the resteraunt's butcher room and the dog pound, but that's not an egg.)
If you click on the order intercom in the drive through, you hear Butthead say, "We're, like, closed."
What's more, if you go inside the resteraunt, go behind the counter, and go to the drive through window (which is closed), you see a french fry frier and a can of worms. This is a reference to an episode of B&B where they fried a bunch of worms in the frier and gave them to their boss, who thought they were delicious.