Other mistake: After the turkeys start attacking in "The Running of the Turkeys", Mr. Fishoder and his brother start running. In that clip a Turkey pops out the side of a guy's head. Look in the mid lower right side. Looks like a design error. Pretty big error, no slow down needed to see it.(00:05:20)
The Prince: Hello there, my bothers. I almost didn't see you. I am...the Prince of Persuasia! There are three steps to persuading women. Step number one: Trap your princess. Physically corner her in a room and eventually, your life. Step two: Insult your princess. Insult her face, her body, her brain, her car. The lower her self-esteem, the higher your chances, bro. It's been biologically proven, by me. Step three: Brag. Not lying, but close. Make up a story about how you single-handedly murdered a wild animal. Your story is going to release a hormone, deep inside her body, called "Insatia." It makes women ovulate. For sex!
Trivia: In the scene before the couch breaks, Bob is reading an "Open Toe Living" magazine. This was one of the magazines Sally was selling in s05e16, "The Runway Club."
Answer: S04e15, "The Kids Rob a Train."
Bishop73