This opened up while I was away and a chilly Friday afternoon seemed to be the ideal time to sample it. If you come here to Camden Lock at the weekend be prepared for a wait as the queue is usually right out the door and down the cobbles. The gimmick is that for £4 you watch as your ice cream is frozen before your very eyes with great foaming clouds of liquid Nitrogen. And it’s very smooth since ice crystals don’t get a chance to form. We had the eggnog and the chocolate. It was nice. And smooth. And look! I didn’t use the phrase “mad scientist”!