Is that fear? No. Uncertainty. That is almost like fear, but not quite. The creature likes terror. Screams and pheromones and panic. Those are delicious. This. This is boring.
It strikes the thin wall again causing the wood to groan and crack. Again, harder, and it splinters. The creature grins, eyes gleaming with hunger and radiation.
It shoves thoughtlessly through the last of the wood, clawed hands outstretched for the living man just out of reach.