here is the quote from the sceen, it is not confusing, you were just to lazy to read it. - Edit 1
Before modification by Apsalar Shadowdancer at 26/10/2010 07:24:57 AM
She raised her hands, but as the balefire launched itself, something flashed around her and she jerked. ...
Because she had jerked, the balefire she meant to slice through the cabin and passenger instead had sliced diagonally through the middle of the boat, about where the oarsmen had stood, and the bodyguards. Because the rowers had been burned out of the Pattern before the balefire struck, the two halves of the craft were now a good hundred paces back up the river. Then again, perhaps it was not a complete disaster. Because the slice from the boat's center had gone at the same time the boatmen had died, the river had had minutes to rush in. The two parts of the boat sank out of sight in a great froth of bubbles even as her eyes shifted to them, carrying their passenger to the depths.
Because she had jerked, the balefire she meant to slice through the cabin and passenger instead had sliced diagonally through the middle of the boat, about where the oarsmen had stood, and the bodyguards. Because the rowers had been burned out of the Pattern before the balefire struck, the two halves of the craft were now a good hundred paces back up the river. Then again, perhaps it was not a complete disaster. Because the slice from the boat's center had gone at the same time the boatmen had died, the river had had minutes to rush in. The two parts of the boat sank out of sight in a great froth of bubbles even as her eyes shifted to them, carrying their passenger to the depths.
It is stated explicitly that balefire works this way, also another post has stated Brandon Sanderson has stated that everything has a thread, even inanimate objects.