Animal semen.

Burger Shack Employee:

Ding-dong! May I interject for a second? As a Burger Shack employee for the past three years, if there's one thing I've learned, it's that if you're craving White Castle, the burgers here just don't cut it. In fact, just thinking about those tender little White Castle burgers with those little, itty-bitty grilled onions that just explode in your mouth like flavor crystals every time you bite into one... just makes me want to burn this motherfucker down. Come on, Pookie, Let's burn this motherfucker down! Come on, Pookie! Let's burn it, Pookie! Let's burn this motherfucker down! Let's burn it down! Let's burn it! So you guys maybe should just suck it up and go to White Castle. Kumar:
You can always get your work done in the car. Harold:
Let's do it. Kumar:
All right. Awesome. Then listen, listen - no matter what, we are not ending this night without White Castle in our stomachs. Agreed? Harold:
Agreed. [shakes Kumar's hand then gives him pound] Burger Shack Employee:
Wise choice. You guys might have wanted to stay away from our special sauce tonight. Me and Pookie, we added a secret ingredient. I'll give you a hint. It's semen. [Harold and Kumar show disgusted look, employee then bursts out laughing] Harold:
[Smirks]
Semen. Burger Shack Employee:
Animal semen. [Harold and Kumar scream and drive off as fast as possible]