Darius has OPINIONS about how to cook things with fire. Emma does not. He explains the difference between grilling and smoking, the pros and cons of gas grills versus charcoal grills, and the definition of cookout versus barbecue. Emma has a lot of very good questions like "can you smoke vegetables" and "can you smoke a turkey" and "can you use whisky instead of lighter fluid". Also she has harsh words for Christmas pudding. Here's Darius' 2008 blog post that inspired this episode.