The skill to escaping a belay is a little contrived because it is unusual these days to belay directly from your harness. (That’s the way I was taught to belay on a multi-pitch. But that was years ago.)
Above is the best graphic I’ve seen about how to do it.This is the most clear video demo I’ve seen. (At the end of the video, her baby cries and she has to go rescue it. Which is kind of cute.) Fox Mountain Guides (which is the company Russell wants to work for) has a video showing how to do this also, but the details aren’t quite as clear as the video below.
If you want to geek out on this stuff, go here.