The Invisible Glass, You Know?

Brennan: I don't know whether a lot of that anger then and frustration that we hear about isn't really in some way, just anger towards himself. And as you said, then that image comes of this invisible glass, but there is nothing to stop him from walking home,. There is no barrier there, particularly. Except the need to make a decision, which is should he put his raincoat on or not. Yeah, once again, seems to be completely flummoxed by a small detail.