The crash ball runner attempts to commit two or more opposing players to the tackle, then attempts to make the ball available to teammates by offloading in the tackle, performing a quick play-the-ball in rugby league, or recycling the ball quickly from the ruck in rugby union.
The crash ball is a common tactic in rugby league, especially amongst props and second rowers.
In rugby union, crash ball running is often performed by midfielders as a way to create space for the outside backs.
The crash ball may also be used when an attacking side is a couple of meters away from the opposition try-line.
Size, strength and resilience are the main assets of an effective crash ball runner; passing and handling skills are also important.