Poll of the Week: Robin Williams and Star Trek comedy

As I sat at home, devastated by the death by apparent suicide of Robin Williams, an actor/comedian that I had met and whose career really spans my generation, I thought about the comedy of Star Trek. As serious as the series are at times, being often a commentary on social norms of the time in which they are made, each and every episode has its funny little moments.
This week, in tribute to Robin Williams, we will start a series of polls on the comedy of Star Trek. To kick it off, we will be looking at the original series.
What are your favorite funny moments? Here are a few of mine. If you have others, share them!