A few years ago I had some friends come visit for the weekend. They decided to bring some fresh ingredients for dinner with them on their 4 hour car ride. The guy had access to dry ice at work and decided to pack his cooler full of vegetables with it. I have some hilarious video of him unpacking the food that was now frozen solid. The green onions were brittle as balsa wood and the snap peas were really snappy. We did have fun later filling up the kitchen with a thick layer of fog.