She thought that he was 'making a mountain out of a molehill' by complaining about the placement of the silverware.
The climbers finally 'made it' to the top of the mountain.
a 'mountain' man [=a man who lives in the mountains]
(..) And I would cooperate. I want to know what you've done to Agent Barton. I would say I've expanded his mind. And once you've won, once you're king of the mountain, what happens to his mind? Is this love, Agent Romanoff? Love is for children. I owe him a debt. Tell me. (..)2012 The Avengers