Who Is Playing Games in My Head?

"You mean they were like this when you woke up?" "What I said is true, sir! Please believe me." Zhang Yihan wiped his tears. Beside him, more than a dozen people were lying in various directions, screaming in pain. Zhang Yihan didn't know what happened. He only remembered that he was stopped just after taking out a document bag. As soon as you open and close your eyes, this scene appears around you. As for why he wanted to take this document bag, he also forgot. It should be something very important, right? Damn it! Who is playing games in my head?