[stevesmith]

Have to agree with "don't move when the hole opens", and get steel-toed shoes!!! You'll get stepped on sooner or later.

When you read pass and rush to the line, watch for the tight end dragging over the middle....he'll win, you'll lose.

Also, when the lineman start blocking the defensive player toward you, make sure you're not caught in front of a linebacker and can't get out of the way. Lost a knee from that two years ago and I'm still paying for it today.

I agree with an earlier comment that it takes time to become a good umpire. I was seeing things my third and fourth seasons that I never even thought to look for when I first moved to U.