So listen to Robert, if you have the slightest hesitation of riding the ride, don't ride it. Even if you have ridden it before, if you are feeling sick, extremely tired or overly anxious, please don't ride.
I was at Knott's Berry Farm years ago on the same day a woman died on Montezuma's Revenge. She received a brain aneurysm from the ride but I'd hardly blame the ride. The ride posts warnings and its up to people to know their own conditions. In same cases, you have no idea that you have a condition until it becomes fatal. In cases like this, it's not the ride's fault nor would the rider have ever known they had one. I hate to be so dismissive but let's face it.... These things happen. That's about all you can really say, unless you're an attorney who smells money and deep pockets.