Being grateful for humor - share a story about a time in your career where humor played a part.
Our students didn't see it coming, but they sure appreciated this outrageous surprise. Many were laughing, others were dancing, and one (cough...gasp) recorded us with his device. I honestly can't remember much about the content we introduced that day (other than a healthy appreciation for 80's music), but our willingness to poke fun at ourselves sure was a hit with our students.
(In what may not be such a laughing matter, a video of this silliness may exist somewhere in cyberspace.)