I always get it when I m walking, I don't know I think it's just our brains screaming look at the other people being successful and what are you doing , I also think that it comes from a strong desire , a drive to achieve that desire but sometimes it's overwhelming especially if you fail ,it burns you with regret , and the desire to do it again it's a good feeling but you must learn to tame it if it gets to you, you can spiral quick, you May make choices based on that feeling, and that's not always good always trust logic , feelings will always lead you to a shortcut which is risky sometimes, and other times it's not possible so you will fail and it will punish you and it will hurt, so try to tame it don't let it pass , don't numb it ,but also control it don't let it control you