At the NASA Mid-Atlantic Fall Finale event at Summit Point Raceway, in West Virginia, I got a little excited on the track and didn't realize that I was out of brakes. So I drove it until I had none at all. That was bad, but very fortunately, no real harm was done (except to my brakes).
I chalk it up to good experience. Now I know what to listen for. And with experience, you understand that you and the car are not invincible. That conditions change. That things can go wrong. And that you always have to be careful and vigilant at the track.
Check your brake pad material before every session. And your oil. And your GoPro batteries and media. Live and learn.