So I have a loop I do after work (Landlocked Forest, Burlington, Mass. http://singlespeedphoto.com/landlockedforest), which is lovely. Usually (excluding water breaks and catching my breath) I can complete it dabbing only once or twice, or on rare occasion without dabbing at all. Anyway, there is a section that I can't recall ever stopping at, but.... recently a large fallen tree was chainsawed and left close (about 5 meters) to the rocky lead in to a board walk, and rather surprizingly, I found I couldn't clear the rocky section. At first I thought the fallen tree had somehow changed my approach, but I was able to approach it from almost any angle... with the same result! I tried different speeds... same result. Probably tried it at least 5 times in total. It's really puzzling. And what's more puzzling is the change with the tree shouldn't in anyway have affected clearing this rocky section as it doesn't mean any scrub-off with speed or a change in approach angle, but it's the only thing that has changed. I'm going to give a really good go next time I'm out there. Anybody else had something similar happen?