Talon
I went to Dorney in 2008 and I'm going again this year. The last time I went to Dorney Park, the scariest rides would have had to be Talon and Hydra because Talon whips you around and Hydra is just crazy.
carousel
Many people say that the Medusa is the scariest ride.
Saw-the ride at Thorpe park, England is the scariest ride in the world.
dolly parton
Intimidator
The Jolly Rocker
Oblivion
the aqua loop :)
bungee or tornado
super man ecape
There a few scary rides like Shockwave, G-Force, Apocalypse and Maelstrom. But The scariest one for me was Apocalypse!! :)