Zuckerberg and Musk agree to cage fight challenge.

Elon Musk challenged Mark Zuckerberg to a cage fight after a Twitter exchange about Meta potentially creating a Twitter-like app. Zuckerberg accepted the challenge, saying "Send Me Location." Musk suggested the UFC's octagonal cage in Vegas as the venue and joked about having a move called "The Walrus." Zuckerberg has been training in Brazilian jiu-jitsu for over a year and recently won a no-gi white belt tournament.