I was doing a fuel pressure regulator and didn't cover the intake ports when doing the job. I thought I lost one of the fuel line nuts but it went down the intake and now I have a blown engine. Lesson learned and RIP.

 

Sorry to hear that!

At least you didn't get a ton of electric drill brush particles falling into your lifter galley by extensively priming the oil pump with the intake off on your carefully and completely rebuilt engine. Bearings apparently don't like these particles.

Once I serviced my auto trans in an old 1969 Ford and the engine would start in reverse. When I put fluid back in it took off on me and crushed an old roll-around battery tester between the car and the shop wall............

Once I was given a car to work on that had the front brake pads replaced by a different mechanic but it didn't run (I didn't know about the brakes). Was given to me to fix because my bays had a front end machine that could function as a hoist but you had to go up a small ramp to get onto the hoist part. A group of us got a good run pushing the car and up on my hoist it went - I jumped in and hit the brakes to stop and they went to the floor. The car continued off the front and into the alignment machine pit, tearing the alignment machine off of it's lag screws and knocking it over backwards.

I once watched a service manager put his personal Jeep up on a hoist and warned him it wasn't stable. Sure enough it fell off frontwards and fell over on its top.

When I was 18 I decided to set the float levels on my Holley carb and ran gas all over the intake manifold. Then I proceeded to pull plugs to check compression and put the spark plug wires on top of the engine before cranking........

 

wow and I thought I had a bad day lol. Only thing I can say is we learn from our mistakes.

 

Forrest Gump was right!

 

Sometimes we just have to laugh at and own the stupid stuff that we do. Odds are that if you work on cars enough you will eventually have a brain fart and do something stupid. Now if the same thing happens to you twice, then there is a problem!