Continuity mistake: When Harold and Kumar stop to take a pee and then leave, Harold gets bitten by a raccoon. In one shot Harold's blood stain is seen on his jacket, but in the next shot it's gone, then back again and so forth, until the car comes to a stop.
Continuity mistake: In the scene when Harold and Kumar go into the girl's bathroom and hide in the middle stall, you can see all of the stall doors are closed. When the twins are standing at the mirror in the bathroom, you can see in the mirror that the stall door behind the twin in pink is open, and then it is closed again. (00:23:45)
Factual error: Near the end of the movie where H&K are stealing the skateboarder's truck, there is a Shoppers Drug Mart in the background. Shoppers Drug Mart stores are only located in Canada, not New Jersey.
Continuity mistake: When Harold and Kumar almost crash into Goldstein and Rosenberg we see Goldstein's car stop a short distance behind Harold's. Then in the wide shot the car is now much further down the road.
Continuity mistake: The bloody scar on Harold's forehead changes in different scenes.
Continuity mistake: When Kumar is at his interview for med school, the dean of admissions spills his coffee on himself and puts the coffee cup back on the table, but between shots the handle of the cup changes directions.
Continuity mistake: When Harold and Kumar go into the women's bathroom at Princeton they run into the middle stall to hide from the girls. You can see the legs of the girl in the left stall before she even goes into the stall. (00:23:40)
Revealing mistake: In shots of the drive-through guy at the the Burger Shack, it can be seen that the restaurant has no back wall.
Revealing mistake: During the scene where the gang are beating up the two guys in Newark, observe the black guy in beige pants: he is making kicking motions but not actually connecting with anything. He is about two feet away from the guy on the floor.
Revealing mistake: During the hanggliding scene we see from the close up shot that Harold and Kumar are both on the hand glider. However, from the wider aerial shots there is only one person in the glider.
Revealing mistake: After they almost drive the Xtreme truck off of the cliff, Kumar gives a speech on their ancestors. He appears to be standing too far in front of the vehicle, which is partially over the cliff. In some shots in the same scene we see him standing on a short outcropping, but the angle of him to the vehicle doesn't match with the earlier shots.
Continuity mistake: When Harold is given the paperwork to do by his boss in the beginning of the movie, his boss is giving him an "okay" sign and a "number one" sign with his right hand. The last shot before his boss leaves, he put down his left hand, which he was not using to make the signals.
Factual error: When they stop at the gas station to ask for directions, you can see a Country Style donuts sign on the outside wall. Country Style is a Canadian brand.
Continuity mistake: After H and K almost hit Goldstein, they talk after realizing who's who. Kumar lowers his window and says "Goldstein?" When they show that shot the car that Kumar is in is fairly clean, but in the next shot of him opening the door, it's a lot dirtier.
Continuity mistake: When Harold and Kumar almost get in a car accident, Kumar rolls down his window all the way down when talking to Goldstein, but the next shot of Kumar opening the driver side door, the window is now only half down instead of all the way.
Continuity mistake: As we see Harold and Kumar in the car we see a close up shot of Harold on his laptop. We also see a USB wire in the side USB port to which is attached a small light set off to the left of the screen. In one of the wide shots this light can be seen, but in all the others it has disappeared.
Continuity mistake: Harold's Toyota Camry changes between shots a few different times in the movie. In the beginning and for the majority of the movie, the Camry is one of the more expensive trim levels with alloy rims. During some of the shots, it switches back and forth from this to a base model Camry with wheel covers. One of the times this happens is when they are wrestling with the raccoon.
Continuity mistake: When Harold is getting his mail before the first meeting with Maria, you can see that his apartment number is 426. But when he leaves the apartment with Kumar to go to White castle, his apartment number is 422.
Continuity mistake: When Kumar buys the drugs at Princeton and tells Harold "There are these two filthy p****** waiting to have sex with us" you can see Cindy Kim cross her arms from behind. In the next shot she crosses them again.
Continuity mistake: When Harold and Kumar pull up into the Burger Shack drive-through, the guy goes crazy, saying, "Let's burn this muthaf*cka down.", he then knocks over the rack in the back, and all the stuff falls off of it. A few shots later, the rack is upright again and all the stuff is back on the rack.
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