The actors who play superheroes in the Marvel movies are not superheroic in any way- they're average humans with the very human ability to fail hard.
And even though we see perfection when we watch their on screen performances there's a bunch of bungling, fumbling, cursing, cracking up and bloopering that happens during takes that wound up on the cutting room floor.
Marvel Entertainment released this hilarious gag reel to promote the digital HD DVD and Blu-Ray release of Captain America: Civil War, just in time to get us in that Marvel movie mood again before Doctor Strange comes out on November 4th.
-Via Laughing Squid