Revealing mistake: When Cap is driving the blue Chevrolet Silverado with Black Widow, the gear shift is in the up locked position, not lower on the column, indicating the truck was towed in the scene. (00:54:45)
Revealing mistake: After Steve has made his way onto the boat, he hits two of the terrorists with his shield then continues running and starts a fight with another three terrorists. When Steve punches the third terrorist, his hand only goes as far as his knee. With the terrorist lying on the floor, the punch could never have hit him, but the terrorist is still knocked out anyway. (00:05:50)
Revealing mistake: When one of the guys is shooting the mini-gun at the overturned bus Captain America is in, the spent shells still have the bullets in them.
Revealing mistake: When Fury drives between the Jeep and the Mitsubishi, the sides of both cars are already damaged, and both are missing the mirrors on the sides that Fury drives past, indicating those cars were used for earlier takes. (00:30:40)
Answer: Here's what he said in an interview: The thing with him is, you don't know if he's making up a story to get you to do a certain thing or if he's actually giving you a piece of himself. The great thing for me about that particular story is that is what my grandfather did when I was a kid. He actually ran an elevator in a hotel in Chattanooga, Tenn. That was his job. I used to go down there and sit in the elevator with him while he took people up and down. He got tipped that way and had money in his pocket or in a bag - and a little gun. He always had a pistol with him, some brass knuckles. I did not write that, it was just in there. It totally just happened that way. I chuckled about it. I was trying to figure out if I had talked about my grandfather in some interview somewhere years ago or something and somebody read it and put that in there. I never found out if that was the case. I think it's a true story for him.