At my old fire station we had a phone that had 2 different lines that could both be placed on speaker so we would call 2 different Chinese restraunts at the exact same time, not saying a word, and listen to them talk to each other. "China Fun-no, this China palace. no-this is China fun what's your order, no-whats your order-you call me! We eventually got busted after the 5th try in a week when they used caller ID