I agree, i've been trying to learn myself from photo sequences windsurfing, slalom skating and carving several years. And sometimes it is great hepl, specially when timing of photos is correct. Same goes also when watching films in slow motion, then you really can get all out. Running carves of good rider on 1/8th speed yoy really can see what makes difference, on slope or on track. DVDs are great, i have ruined some many tapes in history doing this