Amid all those reviews of mediocre bars, advice from repellent "dating experts," and lists of places to throw darts in Flushing, every once in a while Time Out NY offers up something truly useful. This week, they answer a question that has probably been on your minds for years. How on earth do you open one of those fire hydrants on a really hot summer afternoon? For, like, those days when your Olympic-size pool is "undergoing repairs."