Why did the smiler crash happen?

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Tags

1. #serious
2. #safety
3. #overrided
4. #train
5. #stuck
6. #unaware
7. #number
8. #injuries
9. #winds
10. #riders
11. #incident
12. #however
13. #collided
14. #warnings
15. #empty
16. #occurred
17. #causing
18. #management
19. #loaded