"Some artists become dull when they stop drinking or drugging, but Adam's not one of them. He's his old self. He loses none of his rubber-band-shooting,water-gun-squirting, public-disrobing spirit when he doesn't drink."
The song 'Numb' is about how The Edge felt when he split up with his wife. He felt like he couldn't do anything, he was useless. He felt numb.