Steve Buscemi was TOTALLY wasted in this movie.
By this I don't mean that he was on drugs during the making of this film, but rather his character was pointless. When we first see him, he is tied up even more securely than Hannibal Lector, giving the audience the (false) notion that he is incredibly dangerous and uncontrollable.
When he is finally released by Cyrus, he ends up being the wussiest criminal on the plane. What a let down!