How do you make a bet on the Super Bowl that makes everyone a winner? Just ask Chris Pratt or Chris Evans. Some pre-game smack talk on Twitter turned into a bet that will thrill some sick kids.

Evans, who plays Captain America, kicked off the light-hearted Twitter feud.

Chris Pratt, or Star-Lord, responded in kind.

The back and forth turned into a bet that benefits the respective cities’ children hospitals.

Pratt finished Evans off by referencing Deflategate.