The frustration of making a costly mistake

Accidents happen. Circumstances that lead to the accident make one second guess the choices that lead to the accident. The intentions behind those choices makes one triple guess his choices.
Lesson learned is that accidents happen when you are at the wrong place at the wrong time, and that the circumstances that place you there should be disregarded if a better decision made the moment before the accident could have prevented it.

Just remember that parking lots are evil and to avoid going in reverse as much as possible.