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For all the fear associated with those rides, theme parks are extremely safe. According to the National Safety Council's survey of conditions at parks, only 1,299 of those 290 million suffered injuries.
That includes mild injuries like twisted ankles and scraped knees, Bill Powers of the International Association of Amusement Parks and Attractions says.
Unfortunately, a few incidents have proven fatal over the years, for a variety of reasons.
Nevertheless, visitors keep coming back.
On Wednesday,
In light of the news, we take a look at some of the worst accidents to take place at Six Flags over the years.
Note: Eric Platt contributed to this feature.