The game of sling and fling!  In the Madison race, there are two riders per team,

with multiple teams participating.  Both riders are on the track at the same time,

but only one teammate is racing at a time.  Each rider decides how many laps 

they want to race.  When they are ready for a rest, their teammate comes down 

the track to make the exchange.  How is it possible?  It's tricky and takes

practice.  The one rider comes by and grabs the hand of the teammate and

flings the teammate forward to get her up to speed.  The rider then goes up track

to roll around the boards waiting for her turn to get back in the race.  When the

bell rings, it is a sprint to the finish.  Interestingly enough, the Madison race

began as a way to get around a law that was passed in New York in the late

1800's, preventing riders from reaching exhaustion when participating in 6 day

races.