Speaking with Empire, Christopher McQuarrie says “the hardest thing I’ve ever had to do” wasn’t filming the incredible biplane sequence at the end of The Final Reckoning or the beautifully put together submarine sequence.

Director Christopher McQuarrie also reveals the stunt that "separated the joints in Tom's fingers," of which he says, "It was so painful to watch."

Tom Cruise says force split his finger joints while dangling off a plane during 'Mission: Impossible - The Final Reckoning.'