People who were fired on their first day at work/saw somebody get fired their first day at work: What happened that led to the firing?

Not exactly on topic but in the spirit of this post have a funny story. Hired a young lady recently entering the work force. She had been working about a week when we did our payroll run. This entailed printing out all the checks with pay details etc. Is done in an administrative office that is obviously kind of private. Not some place you would wake in without permission. Anyhow we started the payroll print and my manager stepped out briefly to get a coffee. When she came back this new employee was flipping thru everyone's pay check. Of course my manager immediately asks what she is doing to which she responds 'oh I'm just wondering what everyone is being paid'.

She honestly thought it was just fine to not only start flipping thru paperwork in the managers office but to also look over employee payroll checks. She simply had no idea and just stated what she was doing like it was just fine. Actually that was her saving grace. While we made it quite clear how inappropriate it was, being it was her first job, we chalked that down to immaturity and didn't let her go on the spot. Had she been older that likely would have been her last day.

Mind you she only last a week longer for a myriad of other reasons. Little common sense.