A man crouches in a vestibule and as he listens to the siren of a passing police car, and he tells himself that he must find a place to hide. As he contemplates this, a sudden movement in the street catches his attention. Investigating further, he finds that the cover has come off of a nearby manhole. The man waits until the siren is no longer audible before stepping out into the street and toward the manhole. Even though the police car is nowhere near, he feels a sense of urgency as he struggles to remove the cover. When he has finally wrestled it from the hole, he lowers himself into the dark cavern. As he nears the bottom, he finds that the rungs he had used to lower himself into the hole have ended and so he finds he must let go and drop...