Was playing a mini comp with my 15 yr old daughter the other nite (she is fiercely competitive too) .
Machine set on 3 balls per game .. best out of 5 games wins (per round) .. she won round one .. round 2 is down to her last ball .. which drains with me 2K in front .. and then Trizone serves up ball 4    , so we keep playing to see what happens .. machine just keeps serving up ball after ball .. obviously its forgotten the ball count .. turn off/ turn on and it only boots to Audit mode .. realised I hadn't changed the backup batteries for a while but can't understand how this would affect RAM when machine is running a game 
Anyway , changed batteries and all is now OK