So, what's your biggest dummy moment??

Towed my car to the track. Borrowed truck, paid gas and tolls and entrance fee (2.5 hr ride), ran one time trial. Smoked hard after 1st gear, pulled back to the trailer, back on, towed home pissed off. Unloaded the car pushing it, stuck it in its parling spot in the garage. About a week later my buddy says " what broke?" I said i was so pissed i havent looked. So we pulled the hood off. The oil cap i pulled off to add a little after i warmed it up was sitting on the intake. Oil everywhere. Nothing broke.