Great! I always wonder what to say when someone asks, "How are you
doing?" Next time, I'll try saying "Pretty well, actually; heck, I"m
having a sphere!"

And see which eyebrow raises...

Yes, the ball end is the peen end. You peen rivets round with it. The
flat (slightly domed) face can make a flat head on a rivet and of
course deliver a whack to a flat object. At least that's what we were
taught, and I have worked a few small rivets this way.

Doug