We’ve used a fast pass for Lion King and Nemo. As far as I can tell, you get in first, so first shot at seats. But I believe you still have CM directing which area to fill. Both shows can hold a boatload of people, but DH just can’t take standing in one spot waiting in line. As long as he is moving a little (like a ride loading) he is ok, but just to stand in one spot (like for Christmas processional) kills his back.