Here's one. When I got acdc premium I stripped it down for a cleaning and when reassembling I accidentally put the plastic over the spinner switch so it wouldn't register. I never realized cause the spinner still made it's shotgun sound and I was busy playing and not looking at the dmd.
I owned it for 3 months and only figured out my mistake months later while playing it one night at the guy's house who bought it off me.
No wonder war machine never scored well