Arm wrestling over the internet...did that while in Santa Clara. At the Tech Museum you'll find 2 arm wrestling stations that can link together or to another station in one of 5-6 museums across the US.
Damn near tore the ligaments in my elbow. Whatever I did, my arm was sore for over a week.
And there's that game in Japan that got recalled BBC NEWS | Asia-Pacific | Japan recalls arm wrestling game
Unfortunately, the article doesn't detail what the users did....if you position your arm wrong, I can see how you can break it.