Fridge Horror, Harsher in Hindsight, and Nice Job Breaking It, Homer: Homer (as a teenager) ruined Barney's life by giving him beer the night before his SATs, and before Barney became a drunk, he was a genius with his sights set for Harvard University.
Hypocritical Humor: When Barney introduced himself as "Plow King", he told Homer there was no problem with a fair competition. Then he shot Homer's tires.
My God, What Have I Done?: Homer felt remorseful for how he tricked Barney into plowing driveways on Widow's Peak.
Shout Out: Homer's trip across the rickety bridge is based on The Wages of Fear and its American remake Sorcerer. The music is inspired by the latter.
Tempting Fate: When Homer and Barney decided to be partners, Homer stated even God couldn't stop them. God takes offense to that and acts accordingly, melting the ice and putting both boys out of business.