Jimmy naively thought that his problem would end.  But here they are, backstage at the Kinetic Playground in Chicago, getting ready to perform, and Jimmy is trying his best to keep himself in check. He literally holds onto sanity with overgrown nails. The tension is killing him. Where they are now, one bad show can completely destroy them. 

Two hours of Jimmy's sloppy guitar work could have completely ruined Zeppelin. 

His stomach is cramping, his chest hurts, his head is pounding, and Jimmy is so scared. They have to be perfect. But he's not good enough, he's going to ruin everything, he's going to ruin everything, and it's going to be his fault. That's all Jimmy needs to get it started all over again.    His breathing is getting too fast. His legs are buckling. He's shaking and there's nothing he can do to stop it. He's out of control, and it scares the hell out of him. 

He's going crazy. He's in a frenzy. Jimmy wants to scream. Shut everyone up, turn off the lights and stop the music. Angry at himself for making it happen again. He runs in search of the locker room, but someone grabs him by the shoulders.

"Hey, hey, that's enough!" Someone shoves a bottle of water to his lips. Someone... You unscrew the lid and bring the bottle to Jimmy's mouth. The water helps. It's cool and refreshing, Jimmy feels a little better. This relieves dizziness. He takes another sip.

His bleary eyes are looking at you and trying to concentrate, and that's the stupidest thing Jimmy's ever done. 

So stupid that it slightly brings him out of his panic stupor.