system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 - How are height requirements calculated for theme park rides?
gpt
ELI5 answer is that they calculate how short someone would have to be to slip out of the restraints, then add plenty of safety margin to accommodate everyone with different-length torsos, legs, etc.

Some rides even have height maximums, where your dangling legs could crash against something. It's the same idea; the max height is calculated and then taken way down, as a safety factor.

In all likelihood someone just outside the limits would be fine. But in these things a huge safety factor is absolutely required.