Flying kick help if you lose movement, once you can't, let's say, move down, but theres a demon downwards, now you can move down assuming that demon is closer than the others, once you are very down and still have the other 3 movement button you can work your way to the down movement orb, this works even if you lose all movement orbs since the kick moves you to the nearest demon, which can be in any direction. See, flying kick is good.