Equipment: A waiter's tray and a glass filled with water or "wine". What it does: When the waiter's tray is swung in a full circle, the glass does not move and the water does not fall out. Concepts ...
A glass of "wine" or water is placed on a waiter's tray, and when the tray is swung in a full circle, the glass does not move and the water does not fall out. Practice this demo in advance. Confidence ...
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