Then what about the light itself?
AFAIK photons have mass, and they DO travel with speed of light. No division-by-zero and universe-sucking-cataclysms occur. Or probably it's possible because of the dual nature of light?

Photons have mass when traveling in speed of light (what they always do), but they don't have a rest mass. If they had one, they indeed would become infintely heavy, but they haven't

Photons can travel faster than light in Caesium gas.
But cant transmit the information Pulse faster.

But another question: if
something cant move faster than light,
you need to be shure, that lenght is fixed.
(1 meter = 1 meter)
But quantum physics state that there is no
definite values before you measure them.

So the distance to by travelled (speed = distance / time)
could at the case of your measuremnt be larger
than 1 meter, thus making the object
move effectively faster than you thought.

Thanks for the explanation. Quantum physics is illogical at a first glance, and this makes it even more intetersting.