As a geek, I run shell scripts to do various things. But I was ignorant of 'say', which speaks aloud text. Thus it can notify when a script is done. Or baffle a non-geek (hint: install a launch agent on their computer that says things periodically).
For example, open a Terminal window, then paste in the following:
say "Like bones, wood weathers and rots hardly at all at high altitude.
At dusk it almost seems to glow in the blue high altitude light."
Say what you will, this is pretty cool.