Steve Rogers: Big man in a suit of armor. Take that away and what are you?
Tony Stark: A genius billionaire playboy philanthropist.
When Maria Hill is being attended to after she gets hurt, her earpiece is on the left side of her face. In the next shot she is talking to Nick Fury and her earpiece is on the right.
While on the helicarrier, Tony Stark is wearing a Black Sabbath T-shirt. Black Sabbath is the band who sung the "Iron Man" song.