We all know the phrase, but did you know that it turns out, the idiom is correct. You can recall certain instances in your life where you know exactly what you were doing and who you were with, for example many of us know what we were doing when we watched the Twin Towers fall, I'm sure. When an emotional event really struck you and made this memory extremely vivid for you, it allowed you to recall details of it years later. This phenomenon is known as Flashbulb memory. This "snapshot" of your moment in time, as it turns out, isn't always as correct as a picture could be, despite how positive of the event you are. Our friend from the vlogbrothers explains an interesting little tidbit about a study of inaccuracies of in our memories here:
So there you have it, next time you're recalling a really vivid memory, you might not be 100%. It's a good thing we have camera phones now, so you can capture the moment, so you don't have to rely solely on your memory.