jury duty sucks... but you suck it up and do it anyways.
my first time, they managed to nail me during spring break. I was pretty annoyed... the case was way boring too. some guy was driving along and as he was driving over a metal place in the road, the plate slid out and rear wheels fell into a 2' deep pothole. the guy was suing the city for damages to his car and medical bills... our case was only to decide liability, though -- there was going to be another case to decide how much money he deserved.
the guy and his wife seemed kinda money-hungry, but since it was only about liability, we ruled in his favor. I mean, if you have a two foot pothole in the middle of a busy intersection, the least you should do is check the plate on a regular basis to make sure that a) it hasn't start to slide off, and b) the pothole hasn't gotten any bigger.