Up until now, Skyler's view of Walt the drug dealer has been one of those half measures that Mike warned us all about. Because she's felt trapped by circumstance, she talked herself into the idea that Walt is just a small player in this game. She can't do that anymore. She's seen who and what he really is. And her immediate reaction to seeing the face of Heisenberg is an understandable one: she grabs the baby and she runs - runs more than 200 miles to the Four Corners Monument to flip a coin about her future. The coin lands in Colorado, so she flips it again, and when it lands in Colorado a second time, she just nudges it back into New Mexico. She's already decided that she'll go back to Walt - even if it's with her full emotional armor up now, to never again risk a backslide like the one they had in "Shotgun" - but if she can't lie to herself about Walt anymore, she has to at least lie to herself that she tried to leave her decision to the fates.