What are the scariest rides at Euro disney?
Although the rides at Disney Hollywood Studios are mostly thrill-oriented, there are some rides in the park that aren't, but are geared to explaining the process of moviemaking. According to the Disney Parks website, Disney's Hollywood Studios by itself, contains 44 attractions (some of these are shows and events).
That just depends on the person and what their greatest fear is. Tower of Terror is the scariest if you hate big drops and falling. Rock n' Roller Coaster would be the scariest if you are afraid of high speeds and/or going upside down (it's the only ride at Disney that has inversions). The more intense "orange" version of Mission:Space would be the scariest if you hate spinning and get motion sickness from it.