The deaths in sunny hill theme park

Well the story is like this, a young boy,10 years old, Thomas,was on the biggest roller coaster in sunny hill city but when he falls of as he goes down the drop everyone is saying it was a accident!!
Or is it!!!

A few weeks after the accident strange things happen more deaths and not many people coming..

a group of children go to the theme park for the last time after dying there on the same roller coaster a 10 year old boy did, the parents of these children start seeing there dead children what is happening? Is this some supernatural cult? Or is it just suicide?