I think fixed gear drills may be a very good idea. I went for a short ride on the bike path today and at one point was passed by a teen aged boy furiously pedaling a BMX. I was still accelerating at a modest rate but was surprised at his speed. Less than a minute later, with the help of a bit of tail wind, I was rolling at 21 mph and passed him back. After an intersection stop, while accellerating again, he evedently was not going to take being passed by an old guy, and came by again, this time his feet were a blur. Then he popped a wheelie on his front wheel. Watching his feet reminded me of a Road Runner cartoon where Wiley Coyote's feet are whirling around in a blur while you hear a jet engine sound spooling up. To learn to spin fast, get a fixed gear bike.