I LOVE this. What a great concept. It reminds me of the writing exercises I did in my college creative writing class, only we would take only one sense to focus on.
I love the Matrixy "bullet time" feel of this. Every little thing noticed and highlighted. In my own head, I heard a very slow heartbeat (Clark's) ticking off every couple of things noticed.
Well done! I particularly loved the detail of the older, lead based paint in some places messing with his x-ray vision. Totally inspired!