Thanks James. This is seconds after the other shot of Danny coming over the brow into the arena of Fort Bill, swinging round with the long lens and getting two different perspectives. I was using AI servo with all 19 focus points of the 7D to track riders. The problem with using all 19 focus points however, is that at times, it can be a bit unpredictable with any of the non central points locking on to a subject, ( the crowd on the right here, for example ). This has been sharpened up slightly in photoshop elements, but I am now using a single focus point to track riders, as this will eradicate this issue. Phew, sorry 'bout that haha!