Complex sentence: When she is asked out by Larry, she incurs the wrath of Marla, another agent that has designs on Larry and is challenged to a fight, getting the better of Marla with an improvised blowtorch from confiscated items, but she vows revenge.
Split into simpler sentences: When she is asked out by Larry, she incurs the wrath of Marla, another agent who wants to be with him. They fight, and Meg gets the better of Marla with an improvised blowtorch from confiscated items, but Marla vows revenge.