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 ...

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 100-year-old tradition was revived by 200 Parisian waiters on Sunday who raced over a mile while carrying a tray of coffee ... water pitchers or bottles of wine. The event has since been ...