Picture in your mind a very ordinary man. He had a nine-to-five jobs, like most people in Western Civilization. He dressed conservatively in order to hold this job. His masters give him slips of paper for being their slave, which he trades for his dwelling, his transportation device, food which is grown or hunted by other people (who, coincidentally get the same pieces of paper for growing or hunting) and other miscellenious devices. None of these things are crucial to his existance or his happiness (except for the food, which he could grow or hunt himself), but he has grown too used to them to give them up. At the risk of over-generalizing, he is one of many people living in the northwestern hemisphere, most of which are exactly like him.
This man gets out of bed at the same time as the other northwestern-hemispherer's, and begins to bath himself in water, and then in chemicals which hide his natural body odour. He also removes his facial hair in the interest of conformity. He notices something funny as he is looking at himself. His subconscious whispers to his intellect about this something funny, but his intellect can't quite hear his subconscious. He puts it off, and bumps his head on the top of the door frame as he leaves his bathroom. "Strange," he exclaims to himself. Then he remembers that only psycho's talk to themselves...
He travels to his slave-place, and notices that his head is closer to the ceiling then usual. He frowns to himself and sits down to work. By lunchtime, he chair creaks, then snaps and falls apart under his weight. He calls the maintenance-slave and leaves the building for lunch. He walks a block or two to his favorite lunch-time place, where they serve prepared food for the slips of paper. He finds he is a little too big to enter the place. He begins to worry...
He can't fit into any of the tiny doorframes. Thus, he took the day off work (by yelling up to his master's window) and tried to go home. That night, he slept on the street. His body took up quite a large amount of space on the sidewalk. When he woke, he found himself lying on the continenent in the northwester-hemisphere of the Earth. By mid-afternoon, he was standing tippy-toe on the planet. A week later, he was about the size of a blade of grass in a much larger dimension...