sometimes your lucid and you think this is a dream it's harder to run and then you run slow, but if you just think Im running like im on a rollercoaster you will run fast, or the background will move quickly, see your not really running in dreams and you never actually move in dreams it's just what you see changes so much that it looks like real life as thats the only way your subconsious views the world. the background is just going faster. along with scenes changing !!