Quoted from mystman12:People leaving machines with a game still in progress. Pretty much only happens in places where machines are set to free play. Like, when I was at Disney Quest, nearly every time I switched to another machine, I realize someone had smashed the start button repeatedly, starting a four player game, launched one ball, and then walk away during the bonus because a pinball didn't immediately reappear in the shooter lane. So I'm left with 11 balls I need to drain, and have to sit there launching balls and letting them drain before I can start playing. Maybe I could have just shut the machine off, but I really don't know if I would have been allowed to do that.
As long as there's credits in it or it's on free play you can hold the start button for about three seconds and the machine will start a new game.