actors messing up on Instagram: "Behind the scenes of Iron Man, Robert Downey Jr. turns every “Mr. Stark” moment into a blooper waiting to happen. He improvises lines, forgets dialogue, and throws in sarcastic jokes that derail takes instantly. Even serious lab scenes collapse when he cracks a smile or adds an off-script quip. Suit malfunctions, helmet delays, and mistimed cues only make things funnier as Downey riffs through every mistake. Tom Holland and the rest of the cast lose it the second