Ten Trampoliners

Ten trampoliners -- each 

nine siblings would outshine. 

The first lands in his neighbor's yard 

and then there are nine. 
     Nine trampoliners try 

to outperform each mate.

The second dislocates her wrist 

and then there are eight. 
     Eight trampoliners. Two 

exhaust their bags of tricks while 

banging both their knees together. 

Then rhere are six.

     (more to come)