"Do not press" button
Many years ago (1997) I designed and programmed a database system to record incoming discharge prescriptions to a pharmacy in a large UK teaching hospital (1000 beds).
It also recorded time to reach various staes in dispensing process (to help tweak processes)
This last bit is irrelevant to the story.
As a bit if fun, I put a button on main menu marked "Do Not Press" complete with "Stop" symbol...
Pressing opened a borderless window dialog asking if you wanted to format HDD..with "OK" and "Cancel". Of course "cancel" started "format" anyway complete with faux Windows progress ending in full screen DOS style "reboot" "screen" and "No operating system" message...
This stayed on screen for 30 secs for effect before "fooled you!" message.
System went live and I waited...unfortunately I missed it's "use" (out on wards) but heard ALL about it.
Our deputy chief pharmacist ran the VAX JAC based stock control/labelling system and managed its use with fearsome SOPs and weekly meetings at recent "errors" by unfortunate staff.
You guessed it, the ine person who should have known better...
He pressed it....deliberately....apparently his went bright red and he went rigid at the "reboot"
much to the delight and mirth of the surrounding staff.
He never told me he had pressed it...staff used to 'dare' new staff members to press it for a laugh with identical effect in the unfortunate.
I retired in 2017 but the system is still in use and ex-colleagues tell me the button is still in regular use