Two other horroer stories. Running a courier company i've seen a few dodgy things but 2 gems that spring to mind that honestly weren't me are.
One lad changed his back tyre on his bike and it was dreadfull on the road. Someone suggested getting the wheeel balanced to he took it to the tyre place to get it balanced.
The wheel went on and nearly wrecked the machine it was so far out of balance. The tyre fitter toook the tyre off to find a 10" adjustable spanner inside the tyre
The second is one of the best dumb ass storys ever and it happened right in front of me. One of the guys had an old Astra diesel van which desperatley needed a service. Some had suggested flushing the engine out. Instead of using flushing oil, he drained the oil and put a hosepipe in the oil filler cap and ran water through the engine for 10 minutes (creating a massive slick underneath the van) then put the drain plug back in and filled it with oil
The clods of white smoke were unbelievable and the van was never right again.