For Week 8 I was inspired while being stuck in traffic in one of the tunnels leading into New York City. I don't remember which tunnel, and it really doesn't matter too much as you can be stuck in any.
It also reminded me of being in an MRI machine as the feeling is similar. From the MRI is where I had the idea for the pulsing percussion.
I wanted an urban feel with the hint of the city looming. You know that eventually you'll get there, and that is what the piece is really about - getting there, eventually. Trying to meditate and relax until that happens.