Yun Lei knew that what he was experiencing at that moment differed from what the Quans or the hunters from before were experiencing. Despite losing control over his body in a very similar way, he had not lost his consciousness. He was fully aware of everything that was happening to him, but was simply powerless to change it.
Because of his proximity to the floating window, he was one of the first people to enter. When he did, he noticed that the people who had entered before were nowhere to be seen. Even though, logically, they should all have ended up in the same place, that was not the case. And no one entered after him either.