Watch the Smoking Hot Cast of 'Avengers: Age of Ultron' Try to Identify Each Other Solely by Muscles

You know that Pandora commercial that went viral last week, where the kids are blindfolded and still pick out their moms in a line-up of possible moms? This is a lot like that but with hot people and muscles and won't make you cry.

MTV's Josh Horowitz asked Chris Hemsworth, Chris Evans, Mark Ruffalo, Scarlett Johansson, Cobie Smulders, and Jeremy Renner to identify their co-stars based solely on biceps. They didn't do particularly well at this, to much hilarity. For what it's worth, one arm is shocking to literally everyone (except Smulders, who correctly guessed the arm's owner because my girl knows hot arms when she sees them) and it's naturally the one belonging to the cast's only 50-year-old, my sweet Ro-BAE Downey, Jr.

In the spirit of watching celebs gawk at the bodies of fellow celebs, check out Zac Efron and the Neighbors cast play Guess the Chest.

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