Re: An ex colleague of mine...
A friend of mine was responsible (circa 2003) for building drivers for a well-known brand of network card.
He wrote a cron job to compile the latest build overnight, then e-mail him the result log.
He made some elementary mistakes, and what actually happened was:
1) build process failed, repeatedly re-trying and re-failing,
2) his C: drive filled up with an ever-growing log file,
3) eventually, when the disk was full, his script progressed to the next stage: trying to email the log to him.
He came into work the next morning to find a very angry IT dept; he'd crashed the company's Exchange servers by trying to send a 2.1GB attachment.