Originally Posted by lucid
Applying the brakes while stopped after a session is a big no-no, so I wouldn't even try it in any manner. I haven't found myself in a situation where I had to do it. The paddocks I've been to are pretty flat. Just identify/claim a flat parking spot for yourself before the session, and make it there after your cooling lap and try to get on the brakes as little as possible, and leave the car in gear as bher has said. I haven't had any problems doing that.
I was thinking of something weird like a red flag situation or something like that.