Sam takes things a tad too far in this clip from "Unforgiven." He's not pleased about getting pulled over by an officer.
Added:
A small town investigation gives us a look into Sam's past on "Unforgiven." Sam's shady past, apparently, based on this preview.
Added:

Supernatural Season 6 Episode 13 Quotes

Whoa, this one's got a little bit of a wild side. It's all in the eyes, Sam. See it?

Dean

Samuel: You think there are maybe calmer ways we could have done all that?
Sam: Do we care?