Re: If you're in the bizz long enough, you'll crash a production machine.
Back in the 1980s I was working in a company that was using Unisys kit (actually rebadged Convergent Technology systems) running CTOS. These could be "clustered" together into small networks. Downstairs, the boss and admin staff used a system that consisted of a network consisting of a master computer, with the hard disks attached, and two or three networked slave machines. Upstairs, each developer had a single computer but one developer (let's call him Derek, mainly because that was his name) had quite a powerful system.
When the downstairs master computer had a problem the boss decided that Derek's computer would have to act as the master computer for a while. Derek did warn them that, in the process of developing software, it was possible that we would often crash the computers, but the boss wasn't deterred. Derek had also discovered (via the CTOS API manuals) that there was a system call the forced a deliberate crash. He wrote a small program to call that API and every so often, when he was bored or whatever, would whisper to the rest of the developers (who were safely isolated on their own systems) something like, "Listen for the shouts downstairs." Then he'd run the program to crash the network resulting in cries of anguish below. He's then shout out something like, "Sorry, but I did warn you that we often cause crashes."
It didn't take too long before a new spare computer was made available and Derek's system became disconnected from downstairs again.