Three balls into sandman at the same time.
About a month ago I loaded 3 balls at the same time into the sandman. I’ve loaded two at time before and they managed to kick out successfully but three did not. Instead the up selenoid fired several times and the ball wedged against the plastic between the sandman and pop bumpers and broke it.
I recommend that you immediately hit the power switch if you ever accidentally load 3 balls into the sandman.