The fat man had only ran the length of the driveway, it was a start but he was already what?\nOptions:\n- fall down\n- dehydration\n- running\n- breathing hard\n- sweat
Let's think carefully first. Step-by-step reasoning process:
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Fat people breathe hard when they run. Fat people tend to get tired and breathe hard just only after running starts. So the final answer is breathing hard.
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