Complex sentence: A geneticist named Miguel O'Hara gained his spider-like powers from a gene-splicing incident, when the company he was about to quit injected him with a dangerous drug called Rapture.
Split into simpler sentences: A geneticist named Miguel O'Hara gained his spider-like powers from a gene-splicing incident. When the company he was about to quit injected him with a dangerous drug called Rapture.