Working in the shop-many years ago, 2 giant blunders that both happened when rushing.
The first was pulling a lifted toyota truck off the lift after a brake job was done. The person finishing the service didn't pump up brakes and top off fluid. I backed up, no pedal and used a Jag vanden plaas edition as an E brake and took out hood and grill.
The second- after spending the morning laying on a cold wet floor replacing a 2 fuel tanks on a K-30 mason dump. I backed to door, there's a bump in floor at door to keep rain water out. When I had resistance, I let off clutch and gave more gas.
Turns out it wasn't bump holding me back. The boss parked an Explorer right behind me and I couldn't see it in either mirror. Hell, must of pushed that thing back a good 2-3 feet.
yeah, the good 'ol days.