Congratulations, you have just failed your ride test. Do not pass go, do not collect 200 pounds. If there is any risk at all, even slightly remote, you e-stop it. If someone had been seriously injured or even worse killed on Colossus the park would take the buck for the incident but it would be ultimately the operators fault. An E-stop is far safer then letting the train complete its journey regardless of how much time it takes to evacuate the train.