 How would you describe the changes in tone through the passage?
Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed.] Anything involving executions had to be referred to the Interplanetary Council on Earth. This walk was part of a regular routine of physical exercise that kept his body hard and resilient in spite of long hours spent in the laboratory. He was making that walk in precisely seven minutes, four and four-fifths seconds. He swore some more and grabbed a towel, wrapping it inadequately around him; it didn't quite meet astern. Through the open door of his bedroom he could see his bed neatly turned down as it should be, but the outline under the counterpane and the luxuriant mass of platinum-blond hair on the pillow was certainly no part of his regular routine. Brian slowly acquired a complexion suitable for painting fire plugs. "Wherethehell's who?" "Quit stallin', bud. All I want is to get out of here—" "Gotcha, chief," Brent whispered understandingly. For the nineteenth time Brian Hanson strode to the door of his cell and rattled the bars. I don't care if you are—" Brian's eyes almost popped out as he saw a gloved hand reach around the guard's neck and jam a rag over his nose and mouth. Swift shadows moved expertly before his astonished gaze. Another guard was caught and silenced as he came around the end of the corridor. Someone was outside his cell door, a hooded figure which seemed, somehow, familiar.
 From detached to intense
 From detached to intense  From excited to calm  From scary to tranquil  From calm to depressing