Complex sentence: He then flees from the laboratory into a busy street, but is so overwhelmed by the lights and the noise that he returns to the lab. Caswell, distraught and desperate, breaks down, pleading for the dead scientist to help him.
Split into simpler sentences: He then flees from the laboratory into a busy street, but is overwhelmed by the lights and the noise. He breaks down, pleading for the dead scientist to help him.