Maud's always found her life to be very simple in her work with rocks. She studies them, analyzes them, breaks them, and farms them. Simple life for a simple mare. But being brought to Ponyville for work with rocks means pulling her out of that simple routine. And when you snap somepony out of a simple routine and simple beliefs, you simply might find something better waiting amidst the rubble. Glass Sugar was waiting for such a thing to appear. Maybe he can provide a new spark for the infamous Mare of Stone?