Today I found out that I could inject HTML into our documentation system.
I quickly tested it with the <style> tag by setting all paragraph tags to have eye bleeding red backgrounds.
Then when seeing that it works I've made a modal that displays a blinking red alert with the headline "Access Denied!", a loading bar that says "Tracing intruder IP..." and another line "Erasing confidential information.. .".
Then I've added an animation to run on all paragraph, heading and list tags - first they bounce and then the become transparent.

Then I asked one of the interns to go to that specific document - one of the longest and most important manuals they have access to.
I then left the room and through a window watched the poor, panicking guy looking into the abyss and "realizing" that he somehow deleted the important files and will be traced down soon.

I had to tell him the truth to avoid a suicide in the office.

It was perfect! I will definitely do this to others! :D