Quoted from Pinchroma:Bumper kill adjustment. You can hold the flippers to turn off the bumpers
in an effort to coerce the ball into the collect lane. It can be set to
Never, Always, or "Collect Lit," which is the default. (That means you can
only kill the bumpers when a Haunted Mode is ready to start.)
These are the fun little things that keep a player on their toes. Keeping track of where a ball is in the bumpers, especially during multiball, and trying to get it into the better lane is pretty cool.