Event - We were in high school, 10th grade, (in India) and we supposed to go on a class trip to some exotic place. The trip was planned and all the students were super excited. That's when I did something ridiculously stupid (well what I did is inconsequential) and the whole trip was canceled, me being the only reason.
The whole class was pissed but the most pissed off was one of my closest friends who has never forgiven me. Not a day has passed since that day, when he hasn't reminded me at least once each day about that trip which did not take off because of me.
Apology - Well, I totally agree that the trip was ruined because of me and I sincerely apologize for that fiasco.