Got this from another forum i frequent.
Since it could be a laugh at the stupid things we've done working on our cars here goes. These are a couple I can think of now, I'm sure there's more:
- grounded headdeck to illumination wire, works sweet til you turn the headlights on
- dropped a bolt down the spark plug hole (thankfully I realised and a magnet saved me taking the head off)
My bad. Should have used the search feature first. Sorry guys