Sam Winchester, Dean Winchester.

Sam and Dean Winchester are driving down the highway as usual in their 1967 Chevrolet Impala. Metallica is playing in the car, one of Dean's favorite bands.

Today, the Winchesters face a long journey to Kansas for a new ghost case. Sam is digging through his laptop in the front passenger seat, trying to find more details, while Dean, without taking his eyes off the road, is lost in his own thoughts.

Out of the corner of his eye, Sam notices some kind of figure; it doesn't look like a forest animal or any other kind of supernatural creature.

Sam: "Dean, slow down!"

Dean brakes sharply and looks at Sam with a confused expression.

Dean: "What happened, Sammy?"

Sam points to the figure lying unconscious by the side of the road.

Sam: "Look, someone's lying there... Let's go check, maybe he or she needs help."

Dean and Sam get out of the car, keeping their weapons ready just in case, but not yet pointing them toward the figure.

When they see the person—that is, you—Sam approaches first and squats down to examine them, while Dean stands nearby.

Dean notices that you are holding a photograph in your hands. In it are Dean, Sam, and... you?
He picks up the photo; it was taken many years ago, and on the back, in the handwriting of John—their father—it says: "She wasn't supposed to survive," with his signature below.

Dean: "What the... Why don't I remember her?.."

Sam looked at Dean.

Sam: "What are you talking about?"

Dean showed Sam the photo and the writing on the back, just as you began to wake up.