Thanks, Pmedic! That was a great video of the dominoes. I can't even claim I didn't know Domino's pizzas, as we have them here (not very acclaimed, though)
OK, not "getting" a humourous story is exemplified by a eulogy at a funeral of the mother of a close childhood friend in 2012. Our respective parents had been close friends since I was old enough to remember. It was a terrible shock; she had a massive stroke at 79. The funeral was very much a celebration of her life, as well as of course being a very sombre event in a packed church.
The family were on holiday in Fiji, back in around 1980, when my friend was about 20. They were staying in a coastal resort, and on the last morning, my friend's mother joined the rest of the family in the dining area for breakfast for the first time, as she'd had breakfast in their suite all the other mornings. She commented that it was nice to see so many single fathers having breakfast with their daughter, on holiday.
My friend and his dad had to get up and go outside, they were laughing so hard. They said they nearly passed out and fell into the pool, they were laughing so hard.
My wife cracked up laughing immediately, but it went gracefully over my head. I suppose about half the people there "got" it...