Peter visits the Quahog Mini-Mart where Chris works after a visit to the local spa . After he threatens to sue the store for Chris ' " sexual remarks " , Peter is given an unlimited gas coupon for a year by Carl . Peter begins to take advantage of the card , even taking a trip into space , until Lois suggests that the family travel to the Grand Canyon . They leave early the next morning but inadvertently leave Stewie behind at home , only realizing that when they visit the site of 9/11 . They first contact Joe but can not get a hold of him . They then contact Cleveland and Quagmire to look after Stewie . After not receiving any calls from either of them , Lois insists that the family return home to Stewie . While driving the car , Peter somehow enters the car next to them , causing the Griffins ' car to crash . When the family attempts to ride a train home , Peter spends the last of the money that they saved on curtain rings . Lois becomes angered and blames all their misfortunes on Peter 's stupidity , only to feel ashamed when he informs her that everyone else respects him for who he is . Eventually , Brian is able to get the family a ride in a pickup truck bound for Quahog
9/11
September 11 attacks
Baby Not on Board