I've done alot of waitressing in my day and I've ruined more than one person's meal. It happens, but I've never given bad service. I have dropped people's meals right in front of them a time or tow. Once it was some guys' birthday and I dropped 5 meals at once. Another time I went DOWN on a slick, greasy spot in the dining room. Fell right on my a$$ in front of everyone with two double cut prime ribs on my plates. And the meal was for my boss's wife's boss, a local doctor they were trying hard to impress. (Nice goin' Jenn!) My a$$ hurt but not as bad as my pride.
I've always had a reputation as the dish breaking queen. I was always trying to carry too much.
Another time I was leaning over a table pouring pop into a glass. One hand was pouring water and the other hand was holding several other pitchers. The hand holding the other pitchers tipped right along with pouring hand and I ended up pouring water all over a baby. It was so awful. The poor thing. I drenched her, in her nice church dress, with ice cold water. I couldn't apologize enough. I had enough sense to get out of the mother's sight after that though.
As far as objects and bugs found in food....never happened to me at any of the restaurants where I worked. One guy did tell me once that "I ain't eatin' no raw f*C*in' chicken!". Don't blame him. That was sick. I've always been able to replace food that people haven't found satisfactory. I always tried to solve the problem for diners instead of making excuses or ignoring the problem. Not that I've always received stellar service, but I do complain loudly if I get poor service.