From my understanding, 'flow' is basically when your mind has set on and is comfortable with some 'procedure' for doing something; at that point, there's no 'me

From my understanding, 'flow' is basically when your mind has set on and is comfortable with some 'procedure' for doing something; at that point, there's no 'meta process' watching the procedure performed, looking for ways to correct it—the procedure just runs on its own (and it runs much more efficiently that way—kinda like representing a procedure in hardware instead of software). If there's much to that, it probably doesn't matter much whether the procedure has immediate physical consequences or receives data from the physical senses.