The wife, boy and I went to a nearby town to eat at a pizza buffet. It was most excellent.
Across the aisle was an elderly couple. Just after we got our food, they rose to leave. As the old lady got up she let out a monumental fart. This baby was a two to three second long duck quack.
Immediately, one of the true laws of nature known to men the world over was again proven true:
Farts are funny.
The boy and I instantly broke into laughter. The wife even smiled. You would have too.