Stupid things you have done

rebuilt a motor and dropped it in, fired up and had low oil pressure. stopped it and took a deep breath...there was a new upper main bearing shell on the bench....and 10 old ones next to it.

I primed a LA motor with a drill and didnt have any oil sender in the hole, the oil guyser shot up right into my face, glad I wear glasses....

Filled a Ford C4 trans with about 2 gallons of ATF. "Dang, this thing is taking ALOT of fluid!" About that time I see a puddle of ATF growing under my boots. It was coming out the top vent! Reminder to self, fill trans when RUNNING and check stick often!

Dont install MSD with old crusty wires and then attempt to adjust timing by grabbing the cap to rotate, while your other hand is leaning on the block. MSD shocks you about 6 times instead of once!