Yesterday on TV, Fisher and Lee were playing a 9 ball match and I have a question concerning an OB frozen to the rail. After playing the shot, the pro said that either the OB or the cue ball must touch another rail to be legal. The OB was on the side rail and slowly rolled into the end rail (legal). If the OB touched the side rail on the other side of the side pocket, instead of the end rail, is that legal? Also, what if the OB had hit another ball into a rail but stopped before it touched a rail?