As I sit here reading your comment, I generated same kind of feeling, throat, neck, down spine, and forearms. I thought, "oh yeah, that thing." I guess I can

As I sit here reading your comment, I generated same kind of feeling, throat, neck, down spine, and forearms. I thought, "oh yeah, that thing." I guess I can kind of do it at will, though it's sort of difficult to explicitly describe. Almost think that when I focus to do it, the effect is more reluctant.