At the left is a sequence I adapted from Clean Run's July, 2011 "Backyard Dogs" article. (The original course called for two jumps instead of a tunnel.) Each exercise offered a chance to see if your dog could by-pass an obvious obstacle when the course called for it.
With the first exercise, I wanted to determine which was faster wrapping right or left at #3. I quickly discovered that although I could wrap Dusty in either direction at #3, getting him from #5 to #6 was only possible when I did a landing side front cross at #5, and it was much easier for me to do that when Dusty wrapped left at #3.
After I watched the video, I gave myself a dope slap for not trying an off-side arm to hold Dusty's attention when I tried running with him on my left past the tunnel.