Hey y'all.
Theres a fic out there that I just remembered, and I know one scene, and that's it. :) So.
Basically, Sam and Dean are in a diner or wherever, and the song "Creep" by Radiohead comes on over the speakers. Sam's coming back from...the bathroom, or something...and he catches Dean mouthing along to the words, and gets mad/angry/worried that Dean's relating to the words ("I don't belong here/I wish I was special/etc) too much. No idea if it was wincest or not, but given the stories I usually read...That'd be a very good bet. ;)
Ringin' any bells?
Thank you!

ETA: Found! Link in comments. :)