People who often listen to ghost stories would definitely know that the scene Yun Shili was experiencing right now is a very common trope.
Generally speaking, the process of this segment goes: open the door, person enters room, light goes out, door closes by itself.
But...that's just "generally speaking."
Yun Shili, he is no ordinary man, he's a master.
Therefore...
It all happened in a flash! Just as the lantern went out, the quick-reflexed Yun Shili tossed it away, and then chua~chua~chua~ performed three swift backflips in succession.
In the blink of an eye, Lord Yun had retreated back out of the room.
And almost simultaneously as he "flipped back" into the courtyard, a gust of sinister wind blew and, with a loud "bang," shut the door.
"Hiss—" Even Yun Shili couldn't help but draw in a sharp breath at this abnormal sight.
