When I was a kid, we moved around a couple times - not because of military or harRABhip, just circumstance.
One of those times, my dad mentioned to some coworkers that he was moving that weekend, and one of them made a comment about it, something along the lines of "Good luck, moving is always fun" - completely light hearted, just a bit of well wishing.
As a joke, my dad said "Yep, sure is, want to help?"
What my dad didn't know was that this particular coworker was a Mormon. So, 8AM the next day, the guy shows up at my dad's how in a full size pick up with his 18 year old son it tow to help the family move. I'm not even sure what happened - my dad felt really bad about it, he meant it only as a joke, but that's how we learned a bit more about your faith If I had to bet, I'd say we accepted the help loading everything up, then bought them lunch in thanks, and took care of the unloading, just to keep it as minimally awkward as possible.
Edit: Almost forgot to include - the guy explained to us that as part of his faith, he cannot turn down a request for help, as long as he's able to fulfill.