This is a MUST read "fix-it" fic that everyone in fandom should read (*koff* my humble opinion). Touch and Go"
(PG-13, Gen, 3188 words)
It gets into Dean's head and gives us Sam's perspective at the same time. There's also original tattoo backstory (and damn if this ain't calling for art because, wow, those visuals!). Beautifully written also. go go go...GO!