What he tells me is he can body bounce to a wall as he walks toward it volley bouncing until it comes to a stop on him. Somehow, after that, he can carry it and run at normal speed since the game doesn't decide he is the ball carrier.
He says it happens on the V3 server under Cubev20b only. That server is running the 2225beta patch.
actually its quite a simple bug... its easier to make the ball stick to walls tho... all you have to do to make that bug happen is bounce the ball with bounce between 2 players and it will get stuck to one of them. You can also make it stick to walls doing this with 1 person.
i did that in the 1.7 april fools version in cube
stand on ball spawn (w/ ball) and shoot it in the sky so it resets
as soon as u shoot it hold the pass button and voila
btw: i havnt tried it in any other versions