Seat Height aka Dudded

On Sunday I managed to get to Oliver's Hill and back. First time on the bike in a fortnight and just needed to get some k's and hours in. Horrible wind all the way back, managed to find a few bunches here and there. But that's not the point. While I was riding in a bunch there was someone down the back on a shiny white Cannondale Multisport 500 (something like this). Their seat was just too high. At the bottom of each stroke their toes where pointing too far down, foot stretched, and hips had to slide from side to side with each pedal. Apart from being bloody uncomfortable he obviously hadn't figured out that if you're foot is fully stretched then it can't exert any force (try to kick a football while your leg is fully stretched out), which means on each pedal stroke his muscles can't actually contribute anything to the pedal stroke. It was that bad I was going to say something, then I saw that the bike had a seat post that was part of the seat tube and the seat was already all the way down. He was stuffed. Dudded. If a bike shop sold him that they should be ashamed of themselves. If he bought it second hand, he dudded himself. Don't put your seat up too high, check out the dudes on TV in Europe, no one over extends, causes injury and reduces the strength of your pedalling.