In the normal world, Laz wouldn't be able to move so fast that he could vanish from sight. Even though people have spoken about the ability to trick the eye with flashy techniques or unique footwork, the fact is that in modern times, a normal person is able to process information much quicker than someone could back before the invention of high speed travel in things like cars and planes. What's more, video games have dominated the modern world, causing even young children to be able to follow along with fast moving action.
Due to the ability that we have to process and react, our eyes are much harder to trick now.
Despite this, Laz was able to move in a way that caused him to disappear from Malene and Ruby's vision.
Neither of them seemed surprised though as both thought they had a pretty good understanding of his body's strength. In this world of free form movement, at least this much was expected.
