Continuity mistake: When Steve, Romanoff and Agent Hill are watching Nick being operated on, Agent Hill is on the left, followed by Romanoff in the middle and Steve on the right. A couple of shots later, as Romanoff says "Don't do this to me Nick", it is now suddenly Agent Hill in the middle and Romanoff on the left, then a few shots later, it goes back to Romanoff being in the middle and Agent Hill being on the left.
Picture added by Casual Person
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