- description
- A type of active [[gameplay-feature:bumpers]] that can retract below the playfield surface during game play, appearing and vanishing according to programmed rules. When raised, they function like standard [[gameplay-feature:pop-bumpers]], firing a solenoid to kick the ball on contact. When retracted, the ball rolls freely over the spot where the bumper stood moments before. This ability to appear and disappear transforms a static bumper field into a dynamic obstacle course — the player must track which bumpers are active and adjust their strategy accordingly. The mechanism adds an element of surprise that fixed bumpers cannot provide.