Cant remember what year it was, but mid 90s. Went to a Range Rover that had cut out while he was driving. He said his son was playing with a cricket ball in the back seat and he had dropped it. while braking for a junction the car just stopped. Turned out the cricket ball rolled forward and hit the inertia switch under the drivers seat.
Another good one was the LDV ambulances with the V8 engine and auto box. There inertia switch was located by the A post on the drivers side. Slam the door hard with the engine running and you pop the switch.
Inertia swithes where the cause of many a breakdown in my day. Rovers in the centre console, Ford on passenger side A post. And many others I have forgotten. Thank goodness Vauxhall used the safety type fuel pump relay, at least they could be soldered back together or bridged out when they failed. At least as a temporary measure. Allthough after a few years we where told to stop bridging relays.