I got called in for Jury duty once. They set it up where they had us all in a big room and assigned you to a judge, and my particular one was the only one of of all the judges who made the selected people fill out a questionnaire about yourself (i.e. where you work, your education, views, etc.) so I figured the case was something serious.
I ended up filling out the questionnaire and sitting there for a while (they played "The Blind Side" on TV's hanging from the ceiling so it wasn't horribly boring). Finally all the jurors for that judge got called out and brought into another room. We were told the case was pleaded and we could go home. That was pretty much it, we weren't told anything about the case.
I went home and slept.