This one’s a bit of a groaner, but I like it.
It was early morning at the military base, and the first sergeant was calling out names for the daily work parties listed on a piece of paper:
The troops remained totally silent.
At that point, someone whispered into the first sergeant’s ear. He looked again at what the last name really said, turned a bright crimson red, and quickly turned over the list to continue calling the names printed on the other side.