Characters from Smallville who have the ability to run at superspeeds, display a speed that is invisible to the human eye but almost aware to those who have the same ability. Notice that when characters (Clark, Bizarro, etc), when they use their speed, their able to perceive (5 senses in motion) in it. Characters such as Bart Allen & The Martian Man-Hunter, are able to far surpass this category of speed (notice their speed light streams). Reaching a level of near-lightspeed.