[ Well, if he insists. Harry weighs the ball between both hands and gets into coach mode. ]

Ok, so you have the ball. You have the pins. You need to roll the ball down the lane and knock the pins down. If the ball falls into the gutters on either side, no points. If you hit all the pins, it's a strike. If you hit some of the pins and then clear them next throw, that's a spare.

You *always* want to strike or spare. Anything less than that and you're fucked.