There's no way I would go on Indy, Matterhorn or BTMRR if I was at risk for a rental detachment. It's just not worth it. Mater is like the scrambler ride at a carnival or fair. There is a lot of force as the vehicle spins and whips around. You don't realize until you're riding it how much you're being pushed around. On POTC, there's the drops, but then there's also the chance that when you're waiting at the end to go back up the hill that your boat will be repeatedly bumped by other boats backing up. These aren't light bumps, they make the boats jerk pretty hard. TSMM the cars whip around when they're looking for a slot between games. Sometimes you might go into the next game and it's only a quick 180 whip or 2. Sometimes you might go between several lanes and whip around 4-5 times. I've also experience an e-stop on an FL dark ride, and I was thrown into the lap bar and then back into the seat. There's plenty of risk on those rides, the added risk of an even harder e-stop on a thrill ride is something to consider in addition to the ride itself.