While teaching the circle of fifths to a high-schooler, we eventually encountered the most dreaded key for saxophonists: C-flat major.
ME: That's right, C-flat, with all seven flats
KiD: I don't even know what that sounds like...
(I reminded him that yes, he does--it sounds exactly like the B scale.
To drive the point home in a most sarcastic way, I played him the same
scale twice in a row, calling by a different name each time.)