It’s all fun and games until someone eventually gets paralyzed or killed.
Then it's hilarious. When stationed on the DMZ many years ago, a Korean soldier who did not understand our level of aggression and proclivity to have friendly fights at the drop of a hat (friendly in the sense that there were no hard feelings after, they could be quite brutal), remarked, "When there is no enemy to fight, you fight each other." Yep, and that's why we are the best Army in the world.