Death the Kid: "Symmetrical" is misspelled. The number of words is odd, and the words themselves are not symmetrical. All of this is bothering me. It's disgusting. It's filthy! It's asymmetrical garbage! Now I must destroy it. Liz! Patty! *boom* Symmetry is everything.
And then years later, when Dean's death happens and he's in hell, Sam purposefully messes with the car and plays crappy music so that maybe Dean will come back to haunt him. Anything to see his face again, hear his voice one last time.