TeamFights (5 vs. 5) mma
TFC Event 1
Every time I think that I've seen it all I come across something like this. (Excuse me if this has already been posted but nothing came up when I did a search.)
Exactly what it sounds like, two teams of five guys all fighting each other at the same time. It looks like they just had a show of six fights. Lots of soccer kicks, stomping downed opponents' and guys getting ganged up on by two or three guys at once. The fights look as if they all ended pretty quickly. Essentially once a team has a fighter get eliminated it all goes downhill fast as the opposing team has the numbers advantage and is free to gang up on the remaining opposition.
There was another thread about a similiar group fighting show in Russia. This one has obstacles and levels so you can jump on someone below you and throw them off.