One of the Royal Guards:

Um, Wizard coming through, a sort of cloud of fiddly air whizzing about around him, looks a bit dangerous, but what was it in pike school? "Wizards always pull to the left when sending out fireballs and stuff", yes I'm sure that's right, which means that really Harold on the other side should get first strike, and I should, er, shrink defensively away. Yes, that's the drill.