The film opens with Barry White's 1974 hit single You're the First, the Last, My Everything. Throughout the film, Chris Tucker's character makes references to the song - including the scene where he proposes a toast and recites the lyrics.
The scene in the Colosseum, Arron raises an AT4 (rocket launcher) to blow up the control booth, as he raises it, you can see through the tube. Obviously no rocket in the launcher. Also, AT-4s are not re-loadable, the launchers have one shot and then are discarded.