The most honest error message in software history. Instead of the usual cryptic nonsense, this machine just straight-up admits it can't do what you want and offers the perfect response button: "Bummer."
After 15 years of debugging, I'd kill for this level of honesty from my code. No stack trace. No hexadecimal garbage. Just "yeah, that's not happening" and a button that perfectly captures my emotional state during the entire development process.