Deliberate mistake: Bare shoulders are forbidden in the Vatican premises, so the sexy dresses in the party would not be allowed.
Deliberate mistake: Ethan draws the outlines of the buildings on the window. But the drawings line up with the real buildings from the camera's viewpoint, not as Ethan would see them.
Factual error: When Tom Cruise is going to defibrillate Keri Russell to disarm the bomb in her head, no defibrillator takes 30 seconds to charge to 150 joules. Most go to 360 joules and if they are not charged in 10 seconds the batteries are depleted enough that they won't charge at all.
Ethan Hunt: I can't get to the roof!
Declan: Where are you?
Ethan Hunt: Look up! Look up!
Trivia: The scene in which Julia brings Ethan back to life is copied almost identically from the scene in "Lost" (Director JJ Abrams' hit TV show) where Charlie is brought back to life. Incidentally, you can hear the "Lost" music played throughout the show, most noticeable when Davian is about to pick up the gun to kill Julia.
Question: What is the Rabbit Foot? It was never really explained in the movie or did I miss something?
Answer: It's never explained. This is what's known in the film industry as a McGuffin, a term popularised by Alfred Hitchcock, which is an item that's crucial to the plot, but the exact nature of which is never revealed because it actually doesn't matter in the slightest.
Suggested correction: He is simply making a quick, crude sketch of the buildings to illustrate his fulcrum idea. It did not need to be within line of his eyesight. He just needed to quickly demonstrate his idea to the team.
jshy7979