Part of what made us fall in love with Iron Man was the wickedly fun portrayal from Robert Downey Jr. In what appears to be completely improvisational bits, Downey continues to brings his own twisted charisma to Tony Stark. In the film, Stark verbally faces off with each Avenger usually culminating in an epic throwdown. Stark’s unwillingness to assemble with his fellow super-friends is a great springboard for the endless taunting and name-calling we’ve grown to love.