Re: So you think you've seen everything... /Runaway Balloon
My husband builds crossbows and arrows (actually, for the crossbow, they're called bolts), too! He mostly only shoots at regular targets these days, but every so often somebody paints an orc for one of the competitions, and I once made a giant spider. (My sister called up the night I was working on it. My mother asked her to ask me what I was doing. "Stuffing a spider." That did startle her a bit, although she wouldn't have blinked if I had said, "Making the head of a humongous dragon out of cardboard boxes and paper-mache," which I've also done.)
This outlandish upbringing may explain why, even as I write this, my youngest daughter is embroidering cobwebs on the costume she's going to wear this weekend.
So, chasing storms if you happen to be a storm scientist, that's not really so strange. Neither is making giant balloons not actually intended to carry small children.
Mind you, if it really was a hoax cooked up by the father -- although what he's supposed to be trying to publicize I haven't yet heard -- then it's not odd behavior but very bad behavior.