Wait, no. He said no fan contact. The ball has to touch something beyond the fence to be a HR. I've seen players go over the fence to bring ball back, not make the catch, and the ball is live. The poster was contending no interference by fans--just player and ball.
Can you point me to one example of a player bringing the ball back from over the fence, not making catch, and umps awarding HR?
For example, on this play below, are you contending that if Pillar grabbed ball, but didn't hold it and dropped it on field of play, umps would award a HR?
And this one would be a HR if he didn't hold it?