I was asked by chef Corey to come do a demo at the culinary school I graduated from in 1997. They have started a new class called Art Cullinare where they study and then learn the techniques of the best molecular chefs. Their first day was El bulli, Alinea and The Fat Duck. We agreed that I would come make a composed dish using some different hydrocollids and the thermal circulator. I would then talk about some techniques using liquid nitrogen. My demo came on the Monday after Thanksgiving. We had not received our normal shipment of LN due to the holiday. There is a small airgas store pretty close to the culinary school so my plan was to stop over in the middle of my demo to fill my small dewar. Everything that could have gone wrong did. My thermal circulator would not work. This was the base for the composed dish. To make it even worse the shop were I went to fill the tank had the same problem, they did not receive there shipment due to the holiday. A good chef will always figure the situation out. I poached the eggs in water, not the same texture but they got the point. As for the LN, I talked about its physical properties and what I use it for. I will go back to the school on Monday so they can actually try something. All I could do is shake my head, smile and get through it. No matter how much planning goes into a event there is always something that will go wrong. The trick is not letting the guest know there is anything wrong.