history: I accidentally threw out my co-worker's lunch today at work. I felt so bad. So_comma_ I accidentally threw out my co-worker's lunch today at work. That happens sometimes.  Was it mistaken for something that might have been sitting there forever?
current: Yeah, it was when I was gathering up my trash when I was wrapping up my lunch, so it was an honest mistake. I felt pretty awful about it.
next: I'm sure if you explain it to them, and maybe treat them to lunch another day, they'll forgive you, if they haven't already.