Emotion is 86% Motion. Their function is to Motivate and prepare us to do something NOW to neutralize what seems to be a threat. Our deep programming is rather primitive, and it remains that way unless we upgrade it through such things as self-talk, anger management training, stress management, etc. When we feel threatened, we are inclined to run away, to hide, to attack, to flip out, to break down in tears, which might be effective sometimes, but mostly not. In addition, we can feel threatened by images in our memory, our foreseeable future, and what we think might be happening out of the range of our senses. When that happens, our deep mind motivates us to do something about it NOW, except there's nothing to run from, nothing to attack, no use freaking out. Often there is nothing at all to be done, so the energy is just swirling around in our body to no avail. The tension and the increase in breathing and heart rate and volume would be useful if we were running or fighting, but not otherwise. We need to learn to stay present, notice that nothing bad is happening, and help our mind to respond to that, rather than the mental images that triggered the emotion. A good analogy is watching a movie. We can get into the movie, but we don't feel personally threatened by it because none of it is actually happening here and now, here in the comfy theater chair or our TV room couch. I hope this is helpful.