an hour later , while george 's mother was being sedated in the emergency room at derry home hospital and while stuttering bill sat stunned and white and silent in his bed , listening to his father sob hoarsely in the parlor where his mother had been playing fur elise when george went out , the boat shot out through a concrete loophole like a bullet exiting the muzzle of a gun and ran at speed down a sluiceway and into an unnamed stream .