So here goes for a drabble with a historical flavour!
During their research, the brothers have an accident with an authentic Shakespeare manuscript.The great bard is less than amused and exacts a unique and entertaining (well, from a spectator's point of view anyway) revenge ...
Disclaimer: Wherefore art they? Nowhere near me, unfortunately.
BARD DAY AT BLACK ROCK
Word Count: 100
"Sam, didst thou a moron call me?"
"Verily, dude, thou art a misbegotten pox-ridden moron."
"God's Teeth! How canst thou blameth me, thou beetle-crushing bitch; the decision to burn the friggin' page was thine."
"'Turn', Dean. Fie; I say thee, 'TURN' the page, not burn it; thou cloth-eared pribbling jerk!"
"Oh ... unknottest thou thy manjigglies, Samantha!"
"Bobby, wilt thou help us seek a solution to this most irksome perplexment?"
"Marry, Bobby, hie thee hence whither lies the answer; withal I desire not to sound like a prattling douchebag."
Bobby would figure out the reversing charm tomorrow.
Assuming he'd managed to stop laughing by then.