Kumar tries to light a homemade bong on a plane, but passengers see that and think it's a bomb. That results in an air marshal tackling Kumar, with the bong flying through the air and breaking on the floor, causing everyone to panic (thinking it's poisonous gas). The marshal holds a handgun to Kumar's head, followed by another marshal tackling Harold and then holding a gun on him as well.
After apparently biting a guard's penis (during forced oral sex), terrorists hit that man and other guards before escaping. When one tries to scale a fence, he ends up in the barbwire and is apparently electrocuted to death (played for laughs).
We see two knocked out Klansmen (from Harold & Kumar hitting them -- not seen). A Klansman trips and falls with a torch, setting his robe on fire.
A man punches another man in the face and stomach (he lies on the floor unconscious). A man punches another man in the stomach. A man knees another man in the crotch. A man slaps himself in the face.
Three men fall out of a plane, two men glide down with a parachute, crash through the roof of a house and the third falls out of sight (presumably dead).
A man threatens to cut a man's genitals off.
A man threatens to kill two men. A man threatens a man in several scenes.
A man argues with airport security and accuses them of racial profiling when they select him for a random drug and weapons' search.
A woman looks at a man and imagines him as a terrorist threatening to make a plane crash.
A man holds up a picture of a little girl and asks another man if he wants to see her get raped and murdered, and then throws the picture against the wall. While questioning two men a man throws a glass against the wall and pounds on a table.
Two men run when they see several other men approaching their car while carrying crowbars.
A man pushes his way into an airplane bathroom while another man is using it.
A man accidentally backs his car into a fire hydrant, and it sprays water everywhere.
An inebriated driver swerves, saying that he saw a unicorn in the road.
A woman falls when her shoe's heel breaks.
People talk about violent acts they have perpetrated against a minority.
A man talks about a woman putting used tampons in a professor's purse.
A man tears out a page from a book, puts it in the back of his pants and pulls it out smeared with feces.
A man urinates on the heads and faces of two men who are hiding.
A man flatulates and defecates in a bathroom where another man is showering (we hear the noises and the man moaning).
Something slimy pours out of a man's shoe. A goat defecates on a pillow in a jail cell.
We see a child with strange hands, a single eye in the middle of his forehead and a beak-like mouth.
A deer walks up to Harold and Kumar and they begin petting it. Suddenly, the deer is shot with a rifle and blood splashes all over the characters. Raymus, the man who shot the deer, walks over to the deer and stabs it with a knife causing a little bit of blood to squirt out.
Neil Patrick Harris tries to escape a situation he got himself into. As he is running away he is shot several times by a shotgun. Blood sprays from the wounds and blood squirts out of his mouth.
Two men are forced by a prison guard to perform oral sex on him: the guard drops his pants, the two men kneel down in front of him and we hear slurping; two other men kneel down in front of a man who also tells them, in crude terms, to perform oral sex on him, and there is a diversion before they actually do so.
There are several scenes of physical violence such as punching, kicking, etc.