I’ve always enjoyed putting cartoon physics into stories. Of course, in more serious stories, we want characters to be believable; make them break their legs, at least. But, you know me; I’ll just push my characters off a cliff and have them get right back up. It’s one of the things that allows me to keep the action going in my scenes.
That’s not to say my characters are invincible; something happens to Desi and Walton in the first book that serves as a reminder of certain things.