If you're using the TXR Lisp REPL, be sure to make a ~/.txr_profile file that has this:

  (if (real-time-stream-p *stdin*)
    (put-line (quip)))

Then you will see a random humorous quip on startup.

The stream test around the put-line is recommended, otherwise you will see the quip even if the REPL is used in a pipe:

  $ echo '(+ 2 2)' | txr
  4