When viewing situations from the outside, it can usually be pretty easy to tell when things are about to go very wrong. Unfortunately, people inside of the system often have no idea. These 21 photos are taken the moment before something definitely went disastrously wrong - whether we know exactly what that is or not. 

Perhaps the most famous of these photos shows George W. Bush smiling happily in a school classroom while an aid leans over and whispers in his ear. The beginning of his troubling legacy began in the next moment, along with the aftermath of the country's most terrible terrorist attack. Couple that with a photo of some dudes chilling in a pool with electrical cords running through it, and you have a couple of tense photos the moment before everything went seriously wrong.