I've been summoned once and got placed for a 2 day trial. Bad thing was I had to go in the first day to see if I was eligible, they decided I was so then I had to call in every weekday for a month to see if my number had been chosen. I called in faithfully for 3.5 weeks, forgot to call in on the last Thursday I was supposed to. Got a voicemail that said I had been chosen and I had 30 minutes to show up or be in trouble.
I ended up swaying half of the jury toward the not guilty side so we ended up with a mis-trial. I had a feeling the guy was guilty (felony DUI) but the state did such a shit job of providing any evidence whatsoever that I didn't think we could convict him based on the evidence provided. The cop didn't do any field tests, no blood tests, just "thought the guy was drunk" and the prosecutor decided we should just take the cops word for it.
The prosecutor met us out in the hallway afterward to ask us why we didn't convict, I had fun telling him he did a shit job.