The old cabin

 The old cabin at the state fairgrounds where Rock set up camp had fallen into significant disrepair. Most significantly, a good part of the floor was rotted through. Rock returned to it after a rock concert in the adjacent coliseum and would be challenged overnight to not fall to the gravel and dirt below the cabin.

The voice of Larry Jones

 At times, in this circumstance, the continuance of mankind on earth hinged on matters Rock had awakened to. It did not this time, but he had to confirm he had dreamed the silliness he lived for much of the night. One sound of the recorded voice of Larry Jones, an Oaklawn regular who has trained two fillies to Kentucky Oaks wins, settled the issue.

Nothing but a shirt

 Rock was seated on a concrete stairwell along a sidewalk adjacent to a parking lot on the northern edge of the UALR campus. As he read one of his textbooks, several students approached. Just then, Rock became aware he wore nothing but a shirt, which he tried to pull down to cover his nakedness. Clearly, there was a break between classes, and he wondered how he could get to his car.