OK, so this happened a while back, but I just remembered it during a conversation with my mother who's visiting us this week.
At one of our family reunions, I saw an uncle I hadn't seen in about 10 years. He'd gone completely bald since the last time I saw him.
Me: "Hey - what happened to your hair?
Uncle John: "It's the strangest thing - one day I woke up and my forehead went all the way to my ass."
I'll keep that line --I just might need it one day.