Complex sentence: On the way out, Barb, clearly out of her mind, tells Stacy that her actions were not premeditated and goes on to call the "event" a masterpiece.
Split into simpler sentences: On the way out, Stacy is met by Barb, who is clearly out of her mind. Barb tells Stacy that her actions were not premeditated and goes on to call the "event" a masterpiece.