Spent ages cursing Lycoming when the engine on a plane I was about to fly refused to start. Then I tried turning the fuel cock to 'On'...
Reached and looked behind me for a map that was on the back seat in IMC once and when I looked back at the AI I was in an 'interesting' attitude...didn't do that again.
Ummed and aaahed about buying a house for 42K in the early 80's. Decided we couldn't afford it, same house recently sold for 320K.
I left school after sixth form and didn't go to Uni which was without doubt the worst mistake I ever made. This was when Uni meant something.