Factual error: They said that they were going to a White Castle in Cherry Hill, NJ. In reality, at the time, the White Castle was located in Pennsauken, NJ (about 10 minutes from Cherry Hill). Also, there are no cliffs anywhere near that location. The area is pretty flat.
Continuity mistake: When Kumar gets out of the car to go pee, Harold pulls out his laptop. As he is leaning forward to pick it up, he is not wearing his glasses. He picks up the laptop with both hands and starts to open it, never having his hands have time to put on glasses but suddenly he has glasses on.
Chosen answer: According to IMDB at this link http://www.imdb.com/title/tt0366551/ Christopher Meloni was the only actor in this role. Chris Elliott was never in the movie.
SAZOO1975