Complex sentence: Accidentally locked inside a test chamber during a nuclear physics experiment, Jon Osterman was completely disintegrated; rather than dying, Osterman gained godlike powers, the first use of which involved re-constituting his own body.
Split into simpler sentences: Accidentally locked inside a test chamber during a nuclear physics experiment, Jon Osterman is completely disintegrated. But rather than dying, Osterman gains godlike powers, the first use of which involves re-constituting his own body.