premise: A circular pathway formed from the real paving stones , going around a small lake , a sort of park . Forget about taking a walk " around the block " , his feet had driven him to put as much space between that building and himself ; every inch forward added another bit of reality , so he had ended up here . With real leaves blowing on real trees . Cut it out already , Colin . What may have caused Colin to get away from the building ?
hypothesis: Colin knew that there were no real trees near it .