Wei Wuxian was more observant than most people and he has gone over that day in his mind a hundred times trying to figure out what he might have done differently.

"Nothing. It was like any other day. I've cut through that alley a hundred times. And I've gone back there just to see if it would happen again. Not that I wanted to see it again but just to..know..but nothing at all seemed different and it hasn't happened since."