I rode the Steel Dragon 2000 in the rain just day before yesterday. As you know, Japan can have massive, and instantaneous thunderstorms. We were going down the 3rd hill, and boom! It definitely stung, but I have to say the worst was practically drowning as you screamed. You cant help but yell on that ride, and the rain went into my mouth in buckets.
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;)Rollercoasters are like parrots...if you take care of them, they should outlive you;)