Employee: 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.
[bursts out laughing]
Harold: [smirks] Semen.
Employee: Animal semen.
[Harold and Kumar scream and drive off as fast as possible]
  
  
  
  
  
   
  
  
[bursts out laughing]
Harold: [smirks] Semen.
Employee: Animal semen.
[Harold and Kumar scream and drive off as fast as possible]
 Employee : 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. 
 [bursts out laughing]  
 Harold :  [smirks]  Semen. 
 Employee : Animal semen. 
 [Harold and Kumar scream and drive off as fast as possible]  
http://www.moviequotedb.com/movies/harold-and-kumar-go-to-white-castle/quote_47621.html