system
Given the following post, respond as if you're commenting on Reddit:
human
[Avengers: Age of Ultron] How would everyone have reacted if Steve lifted Mjolnir?

Say he just lifts it up in the air like nothing. 

How does everyone react?
gpt
There would have been a moment of stunned silence, then Tony would have said a dismissive-yet-respectful one liner about how *of course* Cap could lift the hammer, that's why he's the leader. Ultron shows up a few minutes later, so nothing else really changes, except Thor maybe being a bit more respectful to Cap, and a couple of moments with Cap blasting Ultron drones with lightning bolts. At the end of the day, it's still Thor's hammer.