Had to pay an additional $80 bucks once two years ago. Couldn't really figure out why since the same suitcase and stuffings elsewhere were fine.
It used to be flying first class avoided these issues. Not anymore. Doesn't really bother me though as my experiences have always been good or at least humorous.
Who was it that had that gorilla throwing a suitcase commercial years ago? They should make another ad with the angry dude in a business suit throwing his luggage around curbside check-in.