I did some volunteer work at Opryland in Nashville years ago before it closed down. I worked one of the roller coasters, making sure folks had their shoulder harnesses down all the way. It was pretty fun. A lot of cute girls came through.
The only bad part was they had these swinging gates that kept people in the lines from going past a certain point. When the gates opened up, this little boy bent over for some reason and the gate shut on his chest. Fortunately, they got him out before he got really hurt, but it still scared him, his dad, and all the workers to death. We could all imagine this little boy crushed to death by the gate.