An intrepid reporter at MTV asked the cast of Marvel's The Avengers: Age of Ultron the important questions in life, namely, "Who's bicep is this?"
By now we've all had lifetime passes to the Guns Shows of the Chrises -- Hemsworth and Evans -- but Robert Downey Jr's iron arms had everyone stumped.
These young guns better recognize.
So in the interest of, oh, I dunno, cinema, let's take a look at how the Avengers hunks stack up.
Chris Hemsworth
The reigning king/mythological god of biceps
Ruffalo had the nerve to unleash the guns
And got shot in the face
Chris Evans
No slouch in the arms department, Captain America is giving Thor a run for his money
He even makes this god awful goatee look vaguely sexy.
Jeremy Renner
Don't sleep on Green Arrow
Mark Ruffalo
Last and probably least
But luckily Dr. Banner has some other, impressive qualities
Les Fabian Brathwaite -- ageless, of Ultron