Okay, so last night I was out for a ride (see here: http://app.strava.com/activities/48250011 ) mostly to continue getting used to the new bike. At one point in the ride there is a bit of a climb and then a nice downhill section. When I got about 2/3 of the way down the hill I stopped trying to moderate my speed and decided to accellerate - mostly to see what I could do. At the peak of it my legs were spinning pretty fast and I was starting to bounce a bit, which had me concerned about losing control at speed, so my first thought was to take it down a notch - only, the bike said 'no' (well, I guess it was really momentum speaking at that point) so I committed and just spun it out. It was okay as the road was familiar and I had plenty of room to roll it out.

My question is this: Are there any tips for how to improve the smoothness of my spin when the cadence is high (ie. more than 120 rpm) so that controlling the bike is easier? Is it just practice? Is the right answer simply 'Fool, slow down!'?