1) ETA: Found! Oversight, by kokoda2007. I'm looking for a specific story that I'm about 98% sure I read on FFN. It was genfic, set in an earlier season, and I think it was written back then, too—I want to say S1 or S2, but I couldn't swear to it.

The crux of the story was that the car's parked by the side of the road while Sam's picking up dinner (or some errand like that) and as he's returning to it, he sees a truck start to lose control on the road. Anxious/kinda neurotic from some minor quarrel with Dean earlier, he rushes in to try to get the Impala out of the way. The truck clips the Impala, which in turn strikes Sam.

After the accident, Sam thinks he's fine and goes back to where they're staying and tells Dean what happened to the car, leaving out what happened to him. Dean's upset about the car, naturally; Sam doesn't mention trying to save it.

Eventually Sam collapses from the internal injury he sustained. The doctor who treats him says that he bruised/borderline tore—I think—his kidneys. (Maybe his spleen? Some squishy bit you need intact.) The doctor seems skeptical that Dean could possibly not have known that Sam was hurt, but Dean, who doesn't even find out what Sam did until he goes back to the diner where it happened, is horrified.

A caveat: as precise as I think my recollection of this story is, I wouldn't be surprised to find I've conflated some details from other stories with it, so if you have one that you think it sounds like but it isn't a 100% match, please hit me!


2) Would also love to have people's Sam-whump recs, in the same vein as the above or otherwise. Dean (or Sam, for that matter) temporarily being a dick in ways that make sense for the character is fine, but no Dean-bashing, please. Extra cookies for Sam saving himself and otherwise being badass like in canon. Wincest and gen are both A-OK.