Yes it's happened to me
It happened to a friend of mine who is in his 40's a few years ago too.
He told me the story, because it was the first time it ever happened to him, and it surprised him. He was wacking off, and I think he came once.
He was at it again, for a long time, over an hour maybe
Later on, without having an orgasm, he blew his load. He was soft and he said it just kind of poured out. It had some pumping action, but no squirting, just dumped out, and not the feeling he is used to when he comes either.