It’s common practice for roller-coaster pull through testing, which reveals clearance issues.
![[Image: maxresdefault.jpg]](https://i.ytimg.com/vi/05KKfO9gaZo/maxresdefault.jpg)
![[Image: 200]](https://coasterbuzz.com/CoasterPhoto/CoasterPhotoImage/200)
I can think of a handful of rides where structural modifications were required after the fact due to a failure during these tests... Millennium Force’s first overbank turn probably being the scariest!
![[Image: millenniumforce03-43.jpg]](http://themeparkreview.com/forum/files/millenniumforce03-43.jpg)
(That scallop in the one support arm was added after the ride was built, but before opening. I think about it every time I ride!)
I can think of a handful of rides where structural modifications were required after the fact due to a failure during these tests... Millennium Force’s first overbank turn probably being the scariest!
(That scallop in the one support arm was added after the ride was built, but before opening. I think about it every time I ride!)