Sam worked on that world bridge for almost one day and still he did not see the end of that bridge. He already expected something like this so he did not get disappointed or something like that. But during all this time he experiences many space fluctuations but fortunately he is able to tackle everyone of those graduates and only receives some light injuries.
You can say the more he walked toward his planet the power of the space fluctuation began to increase but previously the old King told him when you reach very close to the end of the bridge the power of the space fluctuation would decrease.
Unfortunately it looks like he still did not reach the end so the power of the space fluctuation just increased. Also during all this time he already noticed those other bridges which also have different colors. He did not see anyone in those bridges and also he doesn't know why but his observation technique wasn't useful in that place.
