A game with only one rule...

No Murder.

This is no joke. The small town of Ashbourn in England plays a game called Shrovetide Football. It is not like any game you have ever seen before.

In the small English town of Ashbourne during 2 days a year the people divide to play a sport with the purpose of scoring the “toughest goal”. Sure kicking a ball into the net takes some skill, but even these people would say scoring in a sport such as rugby is only for the weak. Imagine thousands of people, divided by a river, with 2 days to get a ball across town with one simple rule: no murder. That is only the beginning in Royal Shrovetide Football.

Go and check out the details here. There are two videos but they don't seem to work on the site, but you can fine one here and a longer one here.