actors messing up on Instagram: "Behind the scenes of Superman, even the Man of Steel can’t keep it together. Henry Cavill drops the heroic stare, flubs lines, and laughs when capes snag or flight rigs misfire. What should be epic, powerful moments collapse the second something goes slightly wrong. Harnesses squeak, dramatic poses fall apart, and green-screen cues mistime as the cast struggles to stay serious. Cavill’s dry humor breaks the tension, forcing reset after reset. These bloopers show