Unexpected cork jump. Effective trick and its solution

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Unexpected cork jump. Focus secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

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Focus Description:

The cork jumps unexpectedly.

Focus secret:

Fill the glass three-quarters full with water. The rim of the glass must be completely dry. Cover the glass with thin, resilient cardboard. The cardboard should protrude about 3 mm beyond the edge of the glass, the length of the cardboard is indifferent. Humid air will make it warp - it will arch downwards. Now carefully lift the cardboard by one corner and cover the glass with it again, turning it over with the convex side up.

On this bulge - exactly in the middle - put a cork. Water vapor will moisten the underside of the cardboard; a slight crackle will be heard. The cardboard will bend in the opposite direction and with a sharp push will throw the cork into the air.

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