Complex sentence: Marvin accidentally drops the meteor and both Jeff and Simon grab a piece of the rock, gaining superpowers and engage in a brawl, with Meteor Man winning and draining Simon of his powers by absorbing them.
Split into simpler sentences: Marvin accidentally drops the meteor and both Jeff and Simon grab a piece of the rock, gaining superpowers and engage in a brawl. They continue with their brawl with Meteor Man winning and draining Simon of his powers by absorbing them.