My favorite disconcertion story is from camp in '03. A1 at the line with the ball. B1 is at the top of the circle, hands on knees. In a normal tone of voice, B1 is telling his teammates their defensive assignments, the next play they're running, etc. Just talking, but not stopping.
A1 looks at me and says, "Ref, that's disconcertion."
Without missing a beat, B1 says, "Spell that."
Everybody, including A1, B1 and me, cracked up.