Wait, hold on a second. Sam had been operating under the (fair) assumption that whatever this creature is, it's exactly that; a creature. He understood that there are beings who transform from one thing to another, but this one in particular doesn't ring a bell. His brows furrow together as the blade lowers slightly, his interest piqued.

"What do you mean...you are--were human?" That...that definitely puts a whole new spin on things.

He eyes the extended hand, not ready to take it even with a friendly gesture. Is that a smile? It's hard to tell with that boney skull. Sam doesn't return the gesture or the smile, but his expression appears a little more curious than on edge.

"David," he says with a nod, one of the aliases he uses.