Re: Poorly located switches.
Or the ICL Operator stations with the reset switch (simple toggle switch with a long enough toggle) conveniently placed in the middle of the front panel where anyone can catch it (saw that a couple of times - one hard reset took out an ICL2974 for a few days).
Or on the 3930 when that came out, and it had small toggle switches to place the disks in read-only mode. Saw someone brush past loaded down with stuff and seen the toggle switch flick over. ICL eventually came out with a plastic cover to guard the switches.
<wipes nostalgic tear from eye>