As part of a photography class I'm taking, our homework assignment was to go outside (in this case downtown Knoxville, TN) and in 30 minutes shoot enough to produce 8-10 images that all share a specific theme.  I started shooting reflections but soon realized I was running out of buildings with good reflections...and time.  So about 10 minutes in, I adjusted my theme to "Up."  It was fun, though my neck and knees took a bit of a beating.