It's so annoying when that happens.
I read one time, although I'm not sure the nature in which it was written, true belief or jest, that ideas are out there and come to a person, but if that person doesn't seize them, they go to some other "next person". The first to grab it, gets it.
Someone else probably wrote it down to capture it, so now it is theirs and can't come back.
I love it when people say stuff or I read stuff that makes me see fun ideas or possibilities, whether it's truth or not really. something that pokes the imagination.
I like the haiku you got from it though.