Unrelated to your original comment, but as a British person when I see the use of "Excuse me?" it seems very coarse and sometimes can appear rude.
It is interesting, because my wife (who isn't British and English is her second language) uses this often (as do her friends) and sometimes it appears out of place and is misread as rude (which she is not usually trying to be).
I'm not complaining or dissing you at all, I find these small linguistic nuances very interesting :)