Based on some of the comments I really do wonder if D.O. can predict when things can happen because in this video he had a quick flashback of all the teasers like he knew those things were going to happen and also in the beginning of overdose, when they showed D.O. trapped in the maze there was a quick scenerio of someone banging on something and then later on at the beginning the ones who banged on the walls were Suho and Xiumin almost like he was the one who predicted that. I also think he is warning the memberz because in every teaser except Kai's you can hear whispers as if warning someone, a light sometimes flickers or a device like a celephone or tv malfuntions or an alarm. Each time the members hear or see those things they immediately start running. Also I wonder if these teasers were all just D.O's imagination because in some of the videos the members didn't have rings and when they don't have their rings it means they are dreaming. I also wonder if D.O. was really the cause of all the members except Kai,Suho and Chen for going through all of this trouble because in Mama in the introduction part the narrator talked about how the tree of life was once seperated into two parts. I don't know. Also did you know that the total amount of time it takes to watch all these teasers is 10 minutes and 10 seconds. It was on the twitter account. Weird right? By the way D.O is my ultimate bias in exo.