<Li> Power stroker: A bowler who combines the high hooking power of a cranker with the smooth delivery and timing of a stroker. Power Stroking is a form of "tweening", meaning the form lies somewhere in between cranking and stroking . </Li> <Li> Pre-bowl: Certified bowling conducted outside the normal league day / time schedule . This is to allow bowlers who know ahead of time they'll be somewhere else at the time league play is conducted . A pre-bowl is scheduled ahead of time, usually with the league secretary . Many leagues require a league official to be present to observe a pre-bowl, whereas other leagues do not require a league official present as long as scoring is kept automatically and a bowling center representative can print out the scores . Pre-bowled scores can receive any USBC honor award (such as a 300 game), but only under the condition that the games are bowled in direct opposition with their opponent . ("Unopposed" pre-bowled games are ineligible for honor awards .) </Li> <Li> Rail: The rail references one of two sides of the outside facing pins in a rack--either the 1--2--4--7 or the 1--3--6--10 pins . Spinners will "ride the rail" by starting with the ball (for a right - handed bowler) hitting the 1 - pin on the right side, and then continue to move through the 3, 6 and 10 pins . Also known as "picket fence". </Li> <Li> Ride The Lightning: When a bowler must throw the ball close to the gutter in order to hit one or more pins on the edge . </Li>

What are the four parts of a bowling lane