Well since I have my Ref Cert. I guess that i have to chime in. The ball cannot stop, the rule is that if the ball stops then, not legal. (There was once a time that it could be stopped for LESS than 1 sec) But with the new rules it has been changed. So it is just like the 3 wall rule, it must be immediate. So in short, the ball cannot stop. And it would be better to just run with the it cannot stop at all part. Follow?