Ever wondered what makes a good home field advantage become great? Its knowing how to be loud. Cam can't audible without some sort of noise, if the crowd can be loud, it will GREATLY impair his ability to audible and run the offense.
On the other hand, Alabama's offense needs some quiet so it can check off and call plays, so be really quiet when the Offense is out on the field.
Want to help Bama win? That's how the crowd does it.