I did this kind of a thing yesterday in a wetlands preserve area in Mountain View, CA. First, I scouted my route…peeking into brush…examining the most appropriate obstacles to vault over…best trees to climb. Then, I ran through the brush, jumping branches, crawling underneath, all moving very fast. I climbed trees trying not to disturb all the geese around. The people strolling looked, but I got no comments. It was only when I was sprinting out of brush after doing some fast crawls under branches that I startled a couple kissing on a bench. Oh yeah, they thought I was a freak. I felt like a kid afterward, like I had broken the rules.