Roller rinks need Roller Derby

Oh, please, oh please, oh, please!!!

Roller derby is a contact sport played by two teams of five members roller skating counter-clockwise around a track.
Roller derby is played in two periods of 30 minutes. Two teams of up to 15 players each field up to five members for episodes called "jams." Jams last two minutes unless called off prematurely. Each team designates a scoring player (the "jammer"); the other four members are "blockers." One blocker can be designated as a "pivot"—a blocker who is allowed to become a jammer in the course of play. The next jam may involve different players of the 15 roster players, and different selections for jammer and pivot.

During each jam, players skate counterclockwise on a circuit track. Points are scored only by a team's jammer. After breaking through the pack and skating one lap to begin another "trip" through the pack, the jammer scores one point for passing any member of the opposing team. The rules describe an "earned" pass; notably, the jammer must be in-bounds and upright. The jammer's first earned pass scores a point for passing that opponent and a point for each opponent not on the track (for instance, serving a penalty, or when the opposition did not field five players for the jam). If the jammer passes the entire pack and the opposing jammer too, it is a five-point scoring trip, commonly called a "grand slam."

Each team's blockers use body contact, changing positions, and other tactics to help their jammer score while hindering the opposing team's jammer.

It's wild and chaotic in appearance.
https://media.tenor.com/images/5df12efba36f5c74bfc79451412cb8ee/tenor.gif
https://i.makeagif.com/media/9-09-2015/-IrZLU.gif

https://www.youtube.com/watch?v=5y5Y82gcIoc