What is it? Our worst nightmare. An espresso machine exploding, courtesy of Espresso Made In Italy, a massive Italian database of espresso machines and historical images.

What's it for? A class held by Terry Z and Sarah Dooley at EspressoParts. From their website:

This course certifies the barista basics & advanced techniques within the best practices standards along with preventative maintenance techniques on wearing parts. It mingles the details in the cup with the thought provoking facts, good coffee is crafted and not by chance. Barista Front of House is a progressive class and is an excellent resource for future bar owners. Learning the in-depth language of coffee and equipment, gaining a better sense of what it takes to be successful. This course is also great for baristas and trainers that may be interested in upward mobility!