Okay, to be honest, this thread is confusing me. I will admit that I am a big person, and although I have lost fourty pounds in the past year, I am still overweight.
I haven't been to Cedar Point this year, but last year when I weighed fourty pounds more, I was able to ride Magnum, Gemini, Mean Streak, Blue Streak, Iron Dragon, Corkscrew, and most other rides.
I was not able to ride MF, Raptor, or Mantis, but I was able to ride Power Tower.
According to this thread, the father being talked about was not able to ride many of the rides that I went on last year, but was able to ride MF. This doesn't make much sense to me. I guess it is as much about your proportions as it is about weight.
Anyway, to be honest, I think that the seat belts on Millennium Force should be made longer. I sat in the test seat for Millennium Force and the bar was able to go down fine plus I had plenty of room in the seat. It was the seat belt that caused the problem, and since seat belts can be adjusted longer or shorter, making the seat belt a little longer would not endanger smaller people.
Anyway, I just find it interesting how the rides that people can't ride vary from person to person so much.
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...and enjoy the rest of your day at Cedar Point, The Am-aaaa-zement park!