I think it's fake. If the car were dropping at the time of that photo, the girl in blue's hair would be defying gravity also. None of the people in that photo actuaslly look like they are dropping at the time. Nor do I think the park would sell an on-ride photo in which someone is clearly breaking rid rules.
See, I don't think it's an onride photo. Now that you mention it, I don't see what else it could be, but onride photos are generally of much higher quality. Plus, look at the bottom left: hair = UP.