you can go many ways
tell them your going out of town
tell them your a gay democrat,
at the last minute tell them your grandmama died
or bite the bullet and just go,
couple years ago i went, and didint get picked for anything so they let me go home and i met this koo hispanic bird that gave me a ride home and we got funky later on
so in the end it was worth it
and they pay you somthing like 10 dollers a day as well as your job should pay you regular pay as well.
well least thats how it is in cali..