New cactus

A couple of weeks ago I repotted one of the new cacti after photographing it in flower. While I was doing this a small piece broke off, so, nothing ventured, nothing gained, I popped the piece into a pot, gave it a little water, and then forgot about it. Today I happened to look at it, and found it had already produced a flower of its own!
I’m not sure whether it’s going to survive, but I am certainly getting my money’s worth out of the original!