The scammer asked me what operating system I use, and of course I answered Unix.
He asked me to spell it, which I did using the format "<letter> as in <NATO phonetic alphabet word>," and he took offense to the word for I ("India"), telling me several times to use "Indigo" instead without letting me say anything.
The scammer wouldn't even let me correct myself for him before trying to end the call.
The unsolicited tech support scam call.
That apparently they wouldn't let him hang up himself.