I have a stovetop espresso machine, and I'm constantly amazed at the new and ingenuous ways I come up with to mess it up. Making coffee before you've had your morning coffee is the great connundrum of our generation. Here's a short list of failure modes I've run up against:
- Machine on stove, no water
- Machine on stove, no coffee grounds
- Machine on stove, completely empty
- Coffee and water in machine, machine in refrigerator
- Coffee grounds in water reservoir
- Coffee grounds in brewed coffee reservoir
- Brewing correctly, brewed coffee reservoir still filled with water from washing
- Brewing correctly, head off to work
- Brewing correctly, coffee grounds returned to microwave
That's just a subset, and amazingly I still come up with a new one every few weeks.