Have any of you stopped to think about the reality of a trampoline sidewalk? I know people that can barely walk on concrete. People have bad knees, ankles, and hips. If they don't currently, then they will when they land wrong a few times. Who will be maintaining the springs and fabric? How many people will get injured when failures do occur? While I agree for me personally it sounds like fun for a few minutes, but overall the idea is a failure from inception.