Challenge Accepted: The rules are to do something (How long, fast, etc) you can do. Then the next person says, Challenge Accepted, and tries to beat it IN REAL LIFE! You then have to announce if you won or not.
P1: (Holds breath for 67 seconds) I can hold my breath for 67 seconds P2: Challenge Accepted (Holds breath for 50 seconds) 50, meh, I lost. I can...
Keeps going on. You don't have to put in the parentheses sentences. Make sure you ACTUALLY DO IT! GO!
Aaaaannd I got ninja'd. I would do his instead of mine, but... choose what you want or do both, I guess. I'm not the judge. (Mine would take too long to do, I'm around 4 mins now)