It seems so simple: A little ice cream, a little liquid, a little machine with a scary-looking prong, and presto-nirvana with a straw. So why is it so damn hard to find a really good milkshake around here? Beats us. Maybe the key element is time. Certainly, it takes a little time to get your frosty beverage served up at Coney Island, an agonizing few minutes before it's in your sweaty palm. But then, it takes time to pulverize four(!) scoops of any of the stand's 32 ice cream flavors into a shake so thick it'd stand up without the cup-and so smooth and delicious that, once you finally manage to get the creamy stuff oozing up the straw, you won't want to stop sucking til you're gurgling around the bottom for stray drops. It's a bargain at $2, and a perfect high-fat, high-cholesterol capper to a typical high-fat, high-cholesterol Lexington Market lunch. Hey you can go back to veggie burgers tomorrow. Plus Coney Island can also satisfy all your fresh grated coconut and horseradish needs, god bless 'em.