I'm sorry, but I do not think that this is a half pendant.
If you look at the picture closely, in the circled area there's a white-ish strip that runs along the base of the opening, but it terminates right where you all believe the half pendant is hanging.
I think that what TRJ has circled in this picture is just a piece of trimming that had become partially dislodged from its spot at the bottom of this opening. I think that the trim's purpose would be to cover up the 90 degree angle so the contestants wouldn't be injured by knocking body parts into it.
I think that this is the same for the Jedediah Smith half pendant as well.
Notice that the hanging object forks in 2 directions just below the opening. As seen in previous confirmed half pendant pictures, the hanging half pendant never forked in multiple directions like that. It just laid flat against the wall.
The thing is though that piece of "decoration" is only seen in the runs mentioned in these several posts - "Jedediah Smith", "Xerxes", and "Mount Kilimanjaro". Is it just a coincidence that all of these runs were 1.5 runs from the same production day and there was a crescent looking object below the Jester's Court door and each of these runs? Not to mention, these three runs featured similar paths where the team was forced on the bottom floor en route to the artifact. I really wish we could get a good shot of the Jester's Court in the "Henry Hudson" run since that team had two pendants, but I looked and we don't really get a close-up on the Jester's Court.
And if that is really suppose to be a safety device, then why is it not present in temple runs before and after these set of episodes? Watch episodes like "Sir Gawain" and "Chandragupta", you don't see that safety device all, and those came 3 or 4 runs before "Mount Kilimanjaro". And the quality of the videos don't even give you a close-up on what the object is, so you can't just say that it doesn't look like a half-pendant when we can't even see it close-up.
And as for "Xerxes", who really knows what Noelle was trying to do? I mean whatever that gesture meant didn't mean she found the half-pendant hanging from the actuators. You can look at them closely and you don't see any crescent-shaped objects on them. I sure don't see them and I have watched this suckfest countless times.