It doesn't occur to Sam that he hasn't technically denied being an angel yet. He mostly assumed that actually speaking would have solved that, or helping to haul the guy up - but partly it just didn't occur to him to actually have to say 'no, I'm not an angel.'

He clasps the guy's hand for a moment after he gets to his feet, grip firm and friendly, before he lets go.

"Yeah, I'd say bitching is one word for it." He rolls his shoulders, folding his wings in. "Did you just hit the transport button?"