It's not always useful, and I don't have full control over it - although I can somewhat tell the level of concentration I have to be in to enter that state, I d

It's not always useful, and I don't have full control over it - although I can somewhat tell the level of concentration I have to be in to enter that state, I don't have any control over whether or not I enter it past not focusing extremely hard. It tends to happen when I concentrate on one "thing" in an abstract manner for too long. It has been useful for visualizing overarching design - if I know what an unwritten application needs to do I might visualize how the "parts" should fit together (not in any magic sense, just faster than I would without being in that state). Sometimes it's good for solving logic problems, riddles, etc. Sometimes it's not good for anything at all. Most of the time that it is really useful, it's by coincidence. It's not a physically draining thing for me at all, just a bit disorienting.