I took this photo on the corner of 79th and 3rd last night. Strangely, I was tempted to somehow disconnect the line of liquid nitrogen, seal it, and hail a cab. I wouldn't have gotten that far. Apparently, NYC has several random dewars of liquid nitrogen strategically placed around the city to depressurize lines on the power grid.
I still fantasize about being able to make ice cream in less than 20 seconds with Liquid nitrogen.