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<blockquote data-quote="InVinoVeritas" data-source="post: 5231001" data-attributes="member: 41485">Swinging scythes from hidden recesses.&nbsp;A pool of acid with a block of soda lime above it. If you drop the lime into the acid, the acid is neutralized, but generates a lot of heat in the process.&nbsp;For more fun, have a room filled with a large pool of water. Have a canoe on the near shore. On the bottom of the canoe are large strips of metallic potassium. Fun chemistry experiment: dropping potassium in water will cause the potassium to dissolve into the water. The pH of the water rises as hydroxide separates from the water molecule to combine with the potassium. The free hydrogen atoms combine and bubble out of the water. The action of potassium with the water will cause heat to be generated. The heat ignites the hydrogen. Canoe goes boom.&nbsp;The passage is blocked by a giant metal plate. Nearby, a large metal wheel stands, surrounded by a wooden dais on a metal floor. Turning the wheel lifts the gate, but also generates a large static electric charge in the wheel--and the turner. When the turner steps off the wood dais and onto the metal floor, the turner is grounded and the charge drains off suddenly, shocking the turner.</blockquote>

[QUOTE="InVinoVeritas, post: 5231001, member: 41485"] Swinging scythes from hidden recesses. A pool of acid with a block of soda lime above it. If you drop the lime into the acid, the acid is neutralized, but generates a lot of heat in the process. For more fun, have a room filled with a large pool of water. Have a canoe on the near shore. On the bottom of the canoe are large strips of metallic potassium. Fun chemistry experiment: dropping potassium in water will cause the potassium to dissolve into the water. The pH of the water rises as hydroxide separates from the water molecule to combine with the potassium. The free hydrogen atoms combine and bubble out of the water. The action of potassium with the water will cause heat to be generated. The heat ignites the hydrogen. Canoe goes boom. The passage is blocked by a giant metal plate. Nearby, a large metal wheel stands, surrounded by a wooden dais on a metal floor. Turning the wheel lifts the gate, but also generates a large static electric charge in the wheel--and the turner. When the turner steps off the wood dais and onto the metal floor, the turner is grounded and the charge drains off suddenly, shocking the turner. [/QUOTE]

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