But Thirteens is the other way round, so it works well, *pre-drop* your like oh thats not too bad... *full drop* woah!
Sub-Terra would be full drop than a little bounce and people would be like whats the point in that?
If anything, it will work better with the larger drop first.
If you think about it, people will drop down and say, "Oh, that was a full drop. That must be it." and then they think they can relax, but then another smaller drop comes, and people will not know what has happened. This will increase the sense of fear.