12 year old had his first cross country meet today. They had a 1 mile time trial for their middle school team so they could place the kids in the appropriate mileage/group for their future meets. They ran it after a high school meet, so they had their uniforms on, timing chips, the whole bit. He was of course a little bit nervous, but I just told him:
Run
your race. Push it when you can, and try and
race this. Not just run it.
So the kids are lined up, and the starter goes out in front of them to fire the gun. He raises his arms, pulls the trigger....and.....nothing.

So he regroups, starts the procedure all over again, raises his arms, pulls the trigger....and......nothing.
Finally, he roots around, pulls a whistle out of his pocket, and gets the race started. While I was standing there, I had my Tom-Tom on, because I was going to just get his time so I had an idea of where he was at the end. I'm standing there, HR is at 61 just standing there, and as soon as this guy begins the starting proceedings, my HR jumps to 89.

Clearly I'M ready.
The guy goes off, and the first section is downhill. We had done enough runs together where he knows - kill the downhills and save a little energy on the uphills. This is his first race, so I was interested to see his execution. I was positioned about .4 miles from the starting point, and as it looped around he would pass me and then pass me again coming home.
After the initial rush down the hill, the next bit is a long uphill. He is nice and steady up this stretch, so I'm there to encourage him on. Mom was down the hill, so she had seen him already. She was at the finish line, and I was positioned up from the finish line, so he would see me coming back down the hill toward the finish.
He passes me going up the hill and disappears over the horizon. So now I'm sitting there waiting. After about 9 minutes, we still haven't seen the rabbits come back. The leaders should have been long past, but something isn't right. At that point I realize - this course ain't 1 mile.
In a few seconds, they start coming over the hill. Several minutes after that, I see my son. As he's coming down the hill, I shout out to him:
"You are downhill. Time to push the pace. Your heart rate is gonna go down here. You got this." After the words came outta my mouth, I realized what a nerd I am. Thanks
@Ned.
And he then starts to fly. He starts pumping the pace, so I start following about 15 yards behind. He is pushing hard here - by my watch he was running an 8:00 pace for the last .30 of a mile. Just killing it. He crosses the line at 18:05.
We find out later the course was measured at 1.86!

. Just a bit off.
His pace: 9:43/mile
His previous best when we were doing our previous running was 12:23!

When I told him this later, he had the best smile his face. I'm not sure he thought he did that great, but I assured him that he smoked his previous best. And THAT'S what he is racing against.
A good day.