“The statement “HUH???” connotes that I said something crazy, or non-understandable”
Crazy, no. Non-understandable, maybe. Still not accusatory, exasperatory, or making a statement about you (rather, it is posing a question about something you said, which is different). Incidentally, is exasperatory even a word? (I’ll still use it even if it isn’t, coz I like it 😉 )