3. No strings attached – Avengers: Age of Ultron
Steve Rogers may be a genetically enhanced super soldier but actor Chris Evans is alas only a man. And like any fragile film star, Evans requires a little extra safety when performing his fight scenes. Indeed, when Captain America fights the Avengers: Age of Ultron’s titular villain on the back of a speeding truck, a safety cable can be seen holding the actor securely in place.
2. Bucky’s conflicting date of birth – Captain America: The Winter Soldier
One of the MCU’s most enigmatic figures, Bucky Barnes seemingly died in World War II before being resurrected as the Winter Soldier. So mysterious is this character that even Marvel gets confused about his origins. Indeed, Barnes’ Smithsonian tribute in The Winter Soldier actually lists his date of birth as being in both 1916 and 1917.