I apologise for this up front
Researchers for the Massachusetts Turnpike Authority found over 200 dead crows near greater Boston recently, and there was concern that they may have died from Avian Flu.
The Ornithological Behaviorist very quickly concluded the cause: when crows eat road kill, they always have a look-out crow in a nearby tree to warn of impending danger. They discovered that while all the lookout crows could shout "Cah", not a single one could shout "Truck"
They missed getting in the word "TurnPaahk"!
But ya know, on a medium "straight man" level, "shaggy dog" jokes seem to have dramatically declined in the net age.
The last time I saw jokes with this kind of really big set up was in a British joke book for kids, I think from Harrod's, from the 1980's.
The net seems to like its jokes with "faster punchlines", whether it's Nyancat, or webcomics, or Youtube videos, or your choice of thirteen other things.