Interesting training course

I came across this training course on Albin Ridefelt's blog.As best I can tell, here is how it works. Ridefelt started at the triangle and ran hard to the first control and then back to the trail. At the trail, he tagged off to another runner who took the second control, then ran back to the trail and tagged off to Ridefelt. Ridefelt took the controls east of the trail as they worked their way