Sweet Death – Honey in Death RitualsBefore them, under the garden wall, Forward and back Went, drearily singing, the chore-girl small, Draping each hive with a shred of black. Trembling, I listened; the summer sun Had the chill of snow; For I knew she was telling the bees of one Gone on the journey we all must go! "Stay at home, pretty bees, fly not hence! Mistress Mary is dead and gone!" thesection from John Greenleaf Whittier's poem "Home Ballads" describes the practice
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.