Nickelodeon's 2016 Kids' Choice Awards - ShowThey're just lucky Spider-Man wasn't there -- with his sticky powers, he'd own any game of thumb war.

Chris Evans, aka Captain America, and Robert Downey Jr., aka Iron Man, entertained fans this past weekend at the 2016 Kids's Choice Awards. Their movie "Captain America: Civil War" is coming out in May, and it'll probably be up for some KCAs in 2017. For this year's show, they played a little game of thumb war, complete with adorable team thumb caps. Watch it play out in the video below.

It's a little bit hard to hear them over the cheering fans, and the "'Civil War' thumb war" ends on an ambiguous note, which isn't really fair. Let's hope the film gives us a more definitive ending. (We know it's meant to be controversial.)

Here's the thumb war:

And here are the goofballs backstage:

The guys are friends in real life, but they seem to be having a blast playing up the Cap vs. Iron Man feud of the film. Don't forget to re-watch them beat the crap out of each other in the new trailer, which also features the debut of Tom Holland's Spidey.

"Civil War" open May 6.

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