The Ax
Pairing: Sam/Dawn, but not right away
Disclaimer: Buffy belongs to Whedon and Supernatural belongs to Kripke.
"That's a nice ax," very non-threatening, I'm just curious.
"Thanks, it's an antique."
"Why do you have an antique ax?" Good question, Dean.
"It's for display. You should see it up close, it's a work of art."
"You just used it to decapitate that…"
"Rabid dog. Yes, yes I did. You see, I happened to be walking by." Rabid Dog?
"You happened to be walking by with a decorative ax and thought you'd use it to kill a 'rabid dog'." Dean's not buying it, and he's giving her that look that says 'cut the crap and tell the truth'.
"Yep!"