I see we had a similar reply to sickoflibs.
Also, in Palin’s case jury duty may apparently require her to be on call for 30 days:
http://www.riehlworldview.com/carnivorous_conservative/2011/06/breaking-palin-sentenced-to-30-days-of-jury-duty.html
That was true when I was on jury duty in Iowa. Had to report at the courthouse every week day.