Yep, exactly. You could turn around and see that "parked car" behind you, which happens to be unlocked. You already know that because you're in a "zombie-infested area", any sensible person would have a gun in their glove box. Open the glove box and grab the gun that you know is there.

That's just one way of passive control. Just try to be able to justify every act of control you bestow upon your dreams, so that they remain as vivid and real as this one. (Was bestow the right word to use there? hmm.)