However, they also faced environmental challenges, including incessant rain, mud in a deep clay pit or ditch (into which they jumped to avoid detection), and swollen rushing rivers." Responding "I know what I am," he ripped the main cortex chip from the back of his brain in a conscious choice to be human (and fight against the machines): "I"m better this way.He finds nothing of interest - bank checks, neatly organized records, a large magnifying glass (!), and a leather case holding personal grooming tools.In the spectacular opening scene, there is a view of an endless trail/line of hundreds of prospectors in the Klondike of Alaska in 1898, in the days of the Klondike Gold Rush.