He tactically ignores Duke, since he'll have plenty of time to answer all his questions in Detention. "Well done Vincent and EQ. Five points each." He says, flicking his wand, transfiguring the tables into targets. "Okay, up and at 'em. This is your first ever practical defensive spell. Victoria mentioned it earlier, it is the disarming Charm. Now when you cast the spell at the dummy, be very careful with the wand movement." He demonstrates as he speaks, "You want to hold your wand in line with your chin, lower it in a straight line to about chest-level, and then swirl it as if you were drawing a circle in the air." He explains, holding it at it's final position. "And then recite the incantation: Expelliarmus." He casts, resulting in the wand that the dummy holds being disarmed. "Now you try!"
OOC: I will GM