Been "summoned" 5-6 times and never had to actually go down to the court house. Just had to check the answering machine when I got home every evening for reporting instructions until the time period ran out or (usually) they say to don't bother calling any longer.
The only time I actually go out of it was when Bexar County Texas sent me a notice, through my intermediate duty station in Korea, to my then current station in Omaha, and it arrived the day before I was to report. I called them up and they allowed as to how that was a valid reason and excused me.
I was an alternate on a Court Martial board once, does that count?
Had an Airman in my office in Kelly AFB that was summoned and was absolutely terrified that she would get a murder case to have to decide on.
We told her to take a quarter in and flip a coin. Heads: "He must be guilty or those fine young men of the Police would never have arrested him". Tails: " I know the Pigs grab people off the street and railroad them just to make their stats look good". Either way she wouldn't have to worry about serving on a murder case!
...even before I read MHI, my response to seeing a poster for the stars of the latest Twilight movies was "I see 2 targets and a collaborator".