I have only heard stories, but never experienced it until 20 minutes ago. I had all the machines running, then went into the kitchen to wash my hands after putting my new XPin displays in my Taxi. 10 seconds later I hear KAPOWWW...PSSHSHSHSHHSHHssss...... and my first thought was something stupid like "SHIT! One of my games just exploded!!!" I run out to the garage, yank the surge protector cord out of the wall, look around the corner expecting to see smoke and fire, and there is glass EVERYWHERE. Seriously, everywhere. The backglass on my Police Force spontaneously combusted. The backglass was locked and I know it didnt fall out, the black plastic translite moldings were still standing upright with little bits of glass in them. Luckily it is easier than cleaning up playfield glass and it isnt screen printed, but I am also glad nobody happened to be playing it when it randomly detonated.
Dafuq was that all about?!