Want to impress your friends at a fancy restaurant? Here's what you're looking for when a server offers a taste of that newly ...

Want to impress your friends at a fancy restaurant? Here's what you're looking for when a server offers a taste of that newly opened wine.

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 ...