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Two men stand in a grassy backyard next to a large blue plastic container, one holding a long tube inserted into the container's opening. They drop a substance into the container, triggering a rapid chemical reaction that produces a towering, foamy geyser of light-colored liquid and foam that erupts vertically into the sky, rising high above the surrounding buildings and a clear blue sky. The geyser expands and then begins to fall back down, with the men observing the eruption.