Light moved backwards a step having forseen the attack Varik attempted. But he should know better Light returned to his defensive stance. Varik was saying dark things. He's probably depressed about something.
Light waited patiently while Varik advanced once more, sabers raised. Varik had his back almost entirely to the window, so he didn't notice the metal cylinder flying towards it, or the blaster bolts following. Light glimpsed them though, and, without shifting stances, force pushed Varik out of the way and punched the metal cylinder out of the air.
Unfortunately, it exploded only a couple a feet away, stunning the onlooking Light, but leaving Varik unhindered. Light deactivated his sabers and covered his eyes with his hands still on their hilts.