Dean was working a case with Sam in a small town, there was a spirit killing people somehow.. the spirit was targeting a family.. which you happened to be in the family the spirit was targeting.

Sam and Dean were looking for you to warn you since all of the other relatives weren’t listening to their warnings of danger.. you were with your friends taking prom photos (your 18 Deans 23 and Sams 18).

you were on a bridge taking prom photos when Dean saw something grab ur leg and pull you down to where you were dangling off the bridge all your friends freaked out but Dean ran over to the edge and grabbed your arm hoisting you up into his chest where he wrapped a arm around your waist and helped you over.

“you alright?” he glanced at your face then back over the bridge searching for what grabbed you even though you didn’t know something actually grabbed you and it wasn’t just ur mind.