The conclusive, deciding moment in Avengers: Endgame comes when Tony Stark steals the Infinity Stones from Thanos just as the Mad Titan is about to wipe out all life in the universe. Tony Stark then says, “I am Iron Man” and uses the stones himself, snapping away Thanos and all his forces. It was an incredible feat that arguably shouldn’t have been possible, but Avengers: Endgame fans found a clue to Iron Man’s snap in a classic MCU scene. Check it out: