Complex sentence: The pneumonia he contracts is a mutated strain and, while delirious, he has hallucinations which become solid--fish rain in his sleeping quarters, the 12th century Mayor of Warsaw spontaneously combusts, and two guests materialise in the drive room.
Split into simpler sentences: The pneumonia he contracts is a mutated strain and, while delirious, he has hallucinations which become solid. Fish rain in his sleeping quarters, the 12th-century Mayor of Warsaw spontaneously combusts and two guests materialise in the drive room.