we can't repeat the experience so it can't be tested
on the contrary - you can't hold my hand* but you know more about me than he did, just from AB posts (though don't be too sure I've told you my gender), so you can very easily repeat it. I say it again: we didn't talk, so he knew nothing whatever about me except my name, which I'd given his osteopath friend. And there was, and is, nothing on record about my accident, anywhere in the world.
* For what it's worth - I think the hand-holding was what it was about. He wasn't putting me in touch with dead parents or pets, after all, but he was giving me a sort of physical examination. You'd have to be supersensitive to diagnose a long-past traffic accident from taking someone's pulse, but I think it's within the realms of the possible, not the supernatural. (He made no claims to be psychic.)