For one brief, grim moment, you have the urge to do something truly terrible to this sorcerer who has inconsiderately left a summoned monster around where you had to deal with it, disturbed your precious sleep, attacked your teacher, and now threatens to blow up your hotel room - with you and several other important people inside. Your wrath manifests as a dark and dreadful impulse to show the wrinkly old bastard how a real master summons minions, by calling up angry - no, RABID - weasels inside his pant-skirt, that he may understand what pain and suffering truly are.
But some things are just too horrible to contemplate, even for the reincarnated soul of the King of Evil. Shuddering away from that terrible vengeance, you instead muster all the mystical energy you can, imagine a field of force in the shape of the average NFL linebacker, and direct it to drive the pyromaniac out the door and over the balcony with extreme prejudice.
There is a low whoosh of displaced air as the same force that would allow you to spend an hour levitating moderately large rocks, or that could be shaped into defensive barriers capable of withstanding a few blows from the late Arrogante, is instead spent all in one surge. The sorcerer's head immediately turns in your direction, his eyes wide with surprise and fury, but before he can say or do anything else, he's hit head-on by your attack. It drives him back, though the open door, to the railing, and halfway over the railing - but then, with much frantic flailing of his one free hand and some mad kicking of a leg, the sorcerer manages to stop himself from going over. Your telekinetic thrust is already spent, and you've little magic left to try anything else.
It's a fortunate thing, then, that Lu-sensei hits the jerk like a speeding freight train. You can't see exactly what happens with your fighting master in the way, but there is a furious shriek, a brief pause, and then a burst of orange-yellow light - accompanied by a surprising lack of noise or shaking building.
Lu-sensei stands out on the balcony, looking down into the street below, for a long moment. Then he tsks.
"Wuss."
With a shrug, Lu-sensei comes back inside, firmly closing the sliding glass door behind him. Your teacher does not look at you or say anything, instead beginning a series of stretching and breathing exercises.