Bangbacks have been around for ages, but are considered cheating, and are abuse of the game.
A death save (a well timed standard nudge which causes the ball to bounce off the trough wall and up between the flippers)is not abuse of the machine though, and if it doesn't tilt, is okay, although they are still usually disallowed in tournaments.
Many Data East games, starting with Rocky and Bulwinkle (i think), gave you a point bonus for doing a death save, so it's sorta considered legit on those, though i think if you do it in a tournament you will be forced to drain the ball right after.
ALso on soem tables, even without a center post, the ball can randomly bounce right back up between the flippers off of something. this is okay.
A death save (a well timed standard nudge which causes the ball to bounce off the trough wall and up between the flippers)is not abuse of the machine though, and if it doesn't tilt, is okay, although they are still usually disallowed in tournaments.
Many Data East games, starting with Rocky and Bulwinkle (i think), gave you a point bonus for doing a death save, so it's sorta considered legit on those, though i think if you do it in a tournament you will be forced to drain the ball right after.
ALso on soem tables, even without a center post, the ball can randomly bounce right back up between the flippers off of something. this is okay.