If you’ve been in a crash, you might be suffering from flashbacks. This is when your brain keeps replaying the same moment again and again. Flashbacks occur unexpectedly. You might be in the middle of a task. Suddenly, your attention wanders and you find yourself replaying that moment in your head. How Flashbacks Work In your flashback, you might just be remembering how the crash happened. Or you might be thinking about the various ways in which you might have dealt with it differently. Maybe if you’d done this, that.