I am on Rouge's second level, the one where you are timed with like seven minutes or whatever and you have to get the chaos emeralds, and I am on the fifth mission for it. I already found the first two but I am not sure how to get the third one. I stopped the weight thing in front of it, but I still can't get in because it doesn't have a "G" on it. Can anybody tell me how to open it? Or at least give me some ideas on how to open it?