Explain Holly's journey to the surface in detail.

The pressure elevators work by using gas columns from the earth's core. Foaly leads Holly to E7 where a pod sits. She enters the pod and straps in. Holly tries not to think about the hot magma flow that will push her to the surface at MACH 2 force. The pod shakes into the secondary shaft. Holly's fingers grasp the joysticks. The pod shifts, plunging Holly down the shaft toward the earth's core. Just when Holly has decided that the gases aren't going to come, a vibration starts. The flare from below catches her pod, carrying it upward toward the surface. It is hot, but fairy lungs can sustain this kind of heat. She checks the dials. As the flare dies down, Holly turns on the thermals thrusters. Above her, the docking zone comes into view and she eases the pod onto its landing pad.