dumbest automotive thing you've done?

[MaxHarvard]

We'll today i hit #3,093,938. Quite a milestone for me.

my best 2 stories are:

Today, putting the car back together. I decided to make sure the exhuast was buttoned up OK. So i started it up. She ran really funny, like it does when its super cold outside. I shut it down, look in the engine bay... sure enough... i had forgotten to attach the entire drivers side bank of spark plug wires. DrSyko works a lot better when you run on all 8 cylinders!! LOL

2nd is last year when i had finished bleeding brakes i was too excited to try out my new disc set up that i started driving and heard a very loud THUNK! I get out only to find out that i hadnt secured any of the lug nuts on the front 2 tires.. thank god i only rolled 20 ft!!

whats yours? and it has to be stuff you did, not someone else.