This one freaked ms wizz so much, she wouldn't play the rest of the night.
Was playing a two-player game of SM with ms wizz last night. I tend to have longer ball times and had just finished ball two (player 1). I joined her in the kitchen to let her know it was her ball, and to discuss the ruleset since she had just hit all the white arrows the previous ball.
We became aware of sounds coming from the office where the pins were, and as we stuck our heads around the corner, there was the distinct sound of the machine-gun bumpers, as well as slings and voices. We go over to the machine and find, not just a ball in play, but multi-ball in play. I just picked up at the flippers and continued the ball(s). After I drained (head not really into the ball) it started player 1 ball 3. We just stood and let it make noises just to see if it would put itself in play, but it didn't. Ms wizz wouldn't even finish her last ball. She made me check twice to make sure I turned the machine off when we went to bed.
I have no idea how the ball would have launched itself for a new player much-less how it managed to achieved a multi-ball on its own, but it freaked her out so (and of course comments I made didn't help I'm sure). I'll only be freaked once my GC score is bested by some unknown player.