Continuity: When Harold and Kumar arrive in Texas, the rear license plate on their car is a Texas plate. The car's front plate is from Virginia when they are in front of the whorehouse. The rear plate changes back to Virginia once they get to the house.

Other: At the beginning of the movie when Kumar is on the toilet you can see his gray underwear, which should have been pulled down when using the toilet.

Continuity: In the beginning, Harold has a damaged face and a bandage on the top on his head, but when they arrive on the plane about 2 hours later, his face is not damaged at all and his bandage is gone.

Other: When Harold and Kumar are on the plane with the CIA, the guy with glasses takes down the bald guy and is pointing the bald guy's gun down at him. In the next scene, the guy with glasses is sent out the airplane door along with the gun, but when Harold and Kumar are sky diving, the gun is again in the bald guy's hand.