Maybe I'm not the first to suggest this Tilt Variant, but today I was having a great game on Xmen and my ball was stuck in the play field. It's happened to everyone several times, but I had to move the machine to get the ball free. Unfortunately, I tilted.
Tilt Variant Idea: Change the Tilt so that if there is no scoring in the last minute on the machine, disable the tilt, so I can get the ball free and continue my game. This seems like it would be easy to implement and would not penalize players for something out of their control.