Great photo, Harv. Just the right moment and framing. Your shot, however, also shows my only gripe with the lens: the bokeh of things just behind the focus plane. That and the weight are the only reasons I sometimes miss my 200mm f/2.8 L, which I sold when I seldom used it any more due to the versatility and stunning sharpness of the 70-200 II.
Thanks a lot. This is my 'go to' lens for about 20,000 motocross images a season. It works like a dream.
As far as this shot goes, if you check the EXIF you'll see the aperture is at f/5 and things developed too fast to take time to stop open it up to f/2.8 which would have produced a better background bokeh.