The core

[OP: ]

It had been a long time since all of them were thrown on this strange island.

It was, at the very least, clear to most of the normal examinees that the island was real and they would have to survive here for the stated time or jump off the island if they really do not want to be there for any reason.

They had a choice and their choice in this matter wasn't going to affect their exam results in any way.

They were free to do whatever they want and, they acutely didn't know that, but anyone who was mentally strong enough to jump off the island for any reason was definitely a well-qualified student for their academy.

They would get a passing grade for that great stunt and probably a good score from some of the examiners too.

It was no easy task to overcome a primordial fear like the natural fear of hight.

Death would be the second thing they would experience if they jump off from that high of a place.