Bowling ball random when impacting a full rack of pins on the first delivery of a frame, and sometimes when hitting downed "dead wood" pins on subsequent deliveries—the candlepin bowling sport is the only major one that allows fallen pins, provided no part of any fallen pin extends more than 24 inches (61 cm) forward of the head-pin spot, to remain on the lane's pindeck to be used in knocking down more pins with the next ball delivery in the same round—up to three balls are delivered, much as in duckpins, in each round of candlepins for one bowler. Bowling ball A
Ten-pin bowling ring finger release almost simultaneously. This gives the bowling ball its spin needed for the hook. If the player is right-handed, an ideal position of the thumb after letting go of the ball is "10 o'clock", meaning that the thumb has gone from 12 to 10, as looking at a clock. The corresponding position for left-handed players is 2 o'clock. Of course, there are innumerable variations in style and technique and the position of the thumb can vary from person to person. The second way is to hold the ball without the thumb in the thumb hole. This uses one