It's kind of an odd issue to bring up, most embarrassing moment, but I think it serves a purpose - you are not alone! We've all had chairs collapse on us, seat belt issues, etc.
In my own case, at 285 lbs. I was forced to buy a second airline seat. It wasn't a question of a big butt, it was simply the airline wanted bucks (this was in Costa Rica). Regardless, my self esteem hit the floor. I was embarrassed beyond belief. Yeah, my cussing in Spanish helped a little but I paid up and vowed to never fly with them again.
But most importantly, this turned out to be my "tipping point" event that got me started on an 88 lb weight loss journey. I did some serious soul searching and decided to finally deal with my weight problem, in a positive way. It was my own damn fault so I needed to fix it. And that's what I did.
Any similar experiences?