So space-time bridging is very useful because most people get locked at one step, one of these stations, especially under conditions of stress. And people who have trouble focusing-- and I'm glad you brought this up in this context of ADHD, people have a hard time focusing whether or not they have ADHD or not, tend to skip back and forth between different space-time domains, as we call them in science. So this is a simple exercise that you can do. Focusing internally then stepping out externally, and then stepping back in. All the while paying attention to your inner landscape just simply by focusing on your breathing.