Years ago I made up a script that would incrementally output from random files in a given directory at configurable speeds. Then I'd run a few instances of the script in a bunch of tmux panes so I could make my second monitor look eternally "busy."

I was _actually_ busy enough, and the cubicle walls were high enough then, that I virtually never used it as a real "boss key." But it's fun to make this kind of thing.