$ fortune | cowsay
This command was one of the first I was taught when I first started playing around with the Terminal. It was a way for me to learn different commands and how pipes and parameters worked. I also set it up in my bash profile to open every time I opened a new window.
After having fun with this for a few years, I thought it would be pretty cool to set it up to see Cowsay every time I scrolled through Twitter. I created a small node app, hooked it up to @CowsayPlz and set it up to tweet out every 8 hours.