So they can score on the kickoff (with a fumble). Alternatively, what if it bounced before the end zone but was recovered by the kicking team in the end zone? I believe there's no other way to end that but with a score. If it bounced, for the sake of argument, at the 2 yard line then went in the end zone. If it was then recovered by the kicking team in the end zone, what else could you do with it besides say the kicking team score. It wouldn't be a touch back because it's a live ball once it hits the ground. You can't spot it anywhere else because where would you and why? Even if we have to say, again for the sake of argument, that it hit the ground and then bounced off the leg of a receiving team player, them went into the end zone and was recovered by the kicking team. Didn't get advanced, just recovered in the end zone after becoming a live ball. Score, right?