I had a friend ask another friend to shoot him with a blow dart. First the guy shot him in the leg, but my friend thought that was too easy (he was an overly confident marine reserve), so he asked him to shoot him in the side. The guy did and it punctured his lung, though he wouldn’t admit it.
Then, trying to play it cool, he decided to “go home,” when really he was “going to the hospital.” We all followed him to his car trying to convince him to let one of us drive or call an ambulance, but he just kept saying nothing was wrong. He collapsed right as he unlocked his car and we had to call 911. He’s fine, aside from his injured ego and dim wits.