Indifference - S4-E4
Trivia: When Michonne and Daryl are walking toward the gas station sign, above the word diesel it spells out HELL in upside down numbers. (00:08:59)
Trivia: Eugene is looking for his missing girlfriend, "Stephanie." Princess visits him. He shows her his pinboard with strings attaching clues. He's found out plumber Roman Calhoun, was the last person to see her and tracks him down to a dodgy outfit at "1634 Racine." This is the home address in "The Untouchables" (1987 film about the capture and imprisonment of Al Capone, starring Kevin Costner & Andy Garcia), of Jimmy the good Irish cop, played by Sean Connery. (00:16:44)
Answer: The walkers could have knocked them down more than once. There may have been another wave that knocked down the fence earlier and they're going to put it up again soon.
Captain Defenestrator