It's a difficult race to keep track of. There's so much going on and when the group bunches up and a load of handovers take place, with the new riders being catapulted into the action via the hand sling manoeuvre demonsrated here, you have to be alert to know what's happening.
Riding a velodrome is difficult enough. I did a track taster session which you can read about here. Believe me, the professionals make it look easy. Not sure I could be slinging anyone into the racing!
Photo courtesy of CycleSportPhoto's.com.