This game ball runner originated in London in September 2016. So what is it? It is a game where an individual is bombarded with balls and he/ she has to figure out what to do with them simultaneously. Some key takeaways from the game are: continuous improvement; self-organizing teams; challenge processes; theory of constraints; limiting WIP; Push vs. pull; Kanban. The game has a maximum of 20 players and minimum of 4. Read complete details here: https://www.scrumalliance.org/community/articles/2016/may/ball-runner-an-agile-game