- Complete Monster: The hijackers, though see Villainous Valor.
- Nightmare Fuel: The stark realism of United 93 being highjacked definitely counts as this—the panic, terror at seeing a fellow passenger stabbed, being forced into the back by a man wearing a fake bomb...everything.
- Too Soon: There was much debate over whether five years was sufficient time before attempting a move about 9/11.
- Villainous Valor: The terrorist with the red hairband puts up an uncomfortably valiant fight against the passengers
- Tear Jerker: Your mileage WON'T vary. You will cry watching this movie.