First scrimmage - what to expect?

[PSU213]

I agree with what everyone else said, and I wish to add one more thing--expect the coaches to yap (quite a bit...or more that expected anyway). I was working a scrimmage last year, and a QB was hit hard after he crossed the sideline, so I called a late hit on B on the play. I suppose if this game were on television, the announcers would say this was a "close" call, but it was definitely a foul. The B coach complained about the call. I knew I was right, the call was there, etc., but I wanted to say to him "coach, this is just a scrimmage," but I figured he would not appreciate that. Not that you shouldn't expect coaches to "argue" for their team, but it will be more than you expect. Also, have fun, and best of luck.