Visible crew/equipment: When Nick lights his lighter to burn all of his stuff, two white screens are visible in his glasses. (01:59:00)
Visible crew/equipment: When Romanoff runs into the hospital room (with Steve and Agent Hill already inside) to see Nick being operated on, you can just make out a white tape marker near the bottom of the wall showing where Romanoff is supposed to stand. (00:36:20)
Visible crew/equipment: After The Winter Soldier throws a grenade at the car, Romanoff appears behind and starts fighting with him. Romanoff ties his hands together and the Winter Soldier walks back into a silver car. In the following shot, just as the Winter Soldier aims Romanoff at the other car, it can be noticed that Romanoff has been replaced by a stunt double. This is only visible for a frame or two so you'll have to be quick in order to see it. (01:18:05)
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.