My only "officiating" experience was when I was a freshman in college. I was a student worker in athletics and I was working a volleyball scrimmage we were playing against another school. I guess as it was a scrimmage they didn't have actual officials work it, so they had a couple of us make the in/out calls on the lines. I have to say, it's pretty intimidating getting yelled at by a 6'3 Croatian girl who disagreed with one of my calls.