Like the clack of two snooker balls when they collide.

He also understood why levers work, and Newtonian physics will probably be right about the behaviour of snooker balls forever.

There was a golf ball and two snooker balls: objects thrown at members of the police and media by rioters.

Dozens of youths threw bricks and snooker balls at hundreds of riot police at the point where Catholic and Protestant areas of the city meet.