Please note that this is a generic description of the catch-up feature.  After speaking with Jon, the algorithms involved are possibly more in depth than this.  The catch-up feature was initially used on Lights... Camera... Action! and, shortly thereafter on Vegas.  It was also used on some later titles, possibly six titles total.

Catch-up was a feature that rewarded
a set amount of points to the player, if he / she had the highest score during the end of a ball round.  Or, it would award the player who had the lesser amount of points by increasing their total score to equal another player's next highest score.  Here is an example of how the catch-up feature works after all players have played their balls during a ball round.

Player 1
Player 2
Player 3
Player 4
2,000,000 1,000,000 5,000,000 1,000

Player 4 just drained ball 2.  (Note: Only one player's score would be affected by the catch-up feature).  If any of the particular players were awarded the catch-up during this particular ball, their score would be altered in the following manner.  Player 1's score would be incremented to equal player 3's score, since player 3 had the next highest score.  Player 2's score would be incremented to equal player 1's score
, since player 1 had the next highest score.  Player 3's score would be awarded with 1,000,000 points, since they had the highest score.  Player 4's score would be incremented to equal player 2's score, since player 2 had the next highest scoreThe new scores at the start of ball 3 would now be, (the "*" denotes which player is awarded catch-up during a ball round):

Player 1
Player 2
Player 3
Player 4
2,000,000 2,000,000* 5,000,000 1,000
2,000,000 1,000,000 6,000,000* 1,000
2,000,000 1,000,000 5,000,000 1,000,000*

A player who was victim of the catch-up feature always has a ball remaining in play, so that a player who receives the catch-up feature is not guaranteed a victory. Back to the Jon Norris interview.

Double or Nothing

Double or nothing was a feature where the player had the opportunity to double their score, or lose all of their points. Equally, if the player did lose all of his / her points, they were granted the opportunity to make a certain shot to redeem their points back on Tee’d Off.  This feature was used on several games such as Vegas and Tee'd Off.  Back to the Jon Norris interview.

Other Notable Features

Other notable features that Jon Norris incorporated into his games, and what game they first appeared in are as follows:  Countdown Bonus (Victory), Double Your Entire Score (Diamond Lady), Select-A-Feature (LCA), Super Jackpot (Vegas), Players Choice (Deadly Weapon), Wizard Mode (Deadly Weapon), Everything Doubled (Surf N’ Safari), Trade Feature (Freddy), Kill the Bumpers (Gladiators), Player Access Tournament Mode (Mario Andretti), High Ball to Date (Mario Andretti), and Automatic Ball Time Percentaging (Mario Andretti).  Back to the interviews page.