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Mike spends a day making fireworks from scratch, including the black powder. To avoid sparks (and explosions) mixing is literally done by hand. Mike is completely coated with the explosive dust, including his eyes which burn like the dickens. Shifting gears from dirty to disgusting Mike visits a dairy and peers through the hole in the side of a cow to watch it's digestion process. He even takes a turn as cameraman but first he has to empty the cows guts to make room.