[QUOTE="D";139115602]I think Sonic is a "situation" similar to Flash. I always though he moved around the speed of sound cause its a speed that is most comfortable to him. (perhaps comparable to a light jog for us instead of all out sprinting which would make us tired)
Also, like the Flash, excessive speeds such as the speed of light and faster could be catastrophic to the nearby environment and could possibly damage the ozone somehow. An example of this was in the Matrix (I forget which movie, probably Reloaded) Neo flies after Trinity while she is falling mortally wounded from a building. Dude literally caught up cars, buildings and huge ass semi-trucks drafting behind him.
Flash gets away with his antics cause as we all know, comic writers make superheroes appear MUCH larger than life purposely. I think Sonic might be capable of Flash's speeds since there really isn't an official stance on his max speed and under different writers he's capable of whatever the deem him to be able to do, but since Sonic's world isn't full of super and cosmic powered entities like DC or Marvel, he doesn't really need to "go all out" on as many occassions like the Flash has needed to do.
All of this is subjective of course, my own personal opinion.[/QUOTE]
Flash has the Speed Force. He can break the laws of physics, so none of that happens.