Why do snooker players move their middle finger up and down before taking a shot?
All concentration is on the table and no where else. The finger movement is the final go ahead (whether in snooker or regular 8-ball/9-ball tournaments), before taking your shot. Yes, professional players use different methods and gyrations vary, however concentration is needed to score the shot no matter what movement is made before taking the shot. When you finally decide to take your shot… observe what gyrations you go through…..