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That might be an interesting science experiment, take a two foot tall, three foot diameter watering trough or just a ring, bury it in the ground,fill it to the brim with water, clamp the sheet and set off a blasting cap or M-80 in the water.
In a perfect world you could use the weight holding down the blank as a relief valve, adding or removing weight to regulate the curvature.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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