We get to see a whole new side of Cliff in this episode. Cliff is at the gym lifting weights and wants a challenge. So he piles a mountain of stuff up to lift, but the weight is too much for him and it all collapses on top of him. Cliff is TRAPPED for days and days, left in silence and loneliness, to contemplate. He is left with nothing but agony, despair and guilt, and vows that if he gets out of this alive he will change completly and be nice to everyone INCLUDING CatDog.