If you get an ability to run at the speed of light what will you do? You can run across the whole world or can do something else. Let’s see what can you do if you will be able to run with the speed of light.
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Assume that you have an ability to run with the speed of light.

Let's give your abilities a try. But not for a long time.

Your body will instantly heat up and in no time you will be on fire due to air friction.

Suppose you have a suit which can protect you from high temperature.

Now as you are running with the speed of light, so you can circle the Earth at equator 7 times per second.

But at this high speed you vision will become blur and you will definately hit an obstacle .

This impact will be greater than the collision of two fast moving opposite trucks and you will die.

You may feel tired. Now you can rest, rest in peace.