Boys stabbing each other

[felltoofar.livejournal.com]

 I want to say I read this fairly recently, like within the last month or two. In order to score extras for their first aid kit, the both stab each other a la "Scream" style, except Sam accidentally goes too deep when he stabs Dean.

EDIT: Found and linked to in the comments. 

Comments

[felltoofar.livejournal.com]

That's the one. Crack detective work!

[chiiyo86.livejournal.com]

This was an easy one for me - the author is my beta. Read more of her stories, if you haven't already, she writes wonderful h/c!