Passion of the Christ?

from my recollection none was symbolically religious.

* In the opening credits, Ginger is seen to bounce a Brussels sprout off the wall of the bin in which she is held in solitary confinement. This is a parody of Hilts, in The Great Escape, who does the same with his baseball while in the cooler.

* The escape attempt shown in the opening credits of the Chickens tunneling, and traveling on trolleys down the tunnel, is a reference to The Great Escape, which is how people traveled down the tunnel in that film.

* The scene where Ginger tells Rocky that she wants to get all the chickens out at the same time, and he thinks she is mad, is a reference to a similar scene in The Great Escape between Roger and Hilts.

* Rocky is introduced shouting "Freedooooommm!" in a slightly comedic manner. This alludes to the memorable line of Mel Gibson's portrayal of William Wallace in the movie Braveheart.

* Edwina, the chicken who is killed by the Tweedies at the beginning of the film, is a reference to politician Edwina Currie. Currie was a Junior Health Minister under Prime Minister Margaret Thatcher when, in 1988, she issued a warning about salmonella in eggs. This caused a collapse in the British egg market and Currie was forced to resign (or "get the chop" as commentators sometimes refer to ministers who have resigned or been sacked from office).

* The sequence in which Rocky and Ginger are trapped inside Mrs. Tweedy's pie-making machine and encounter various mechanical dangers is a parody of the three Indiana Jones films' various cliffhanger dangers and subsequent escapes, as well as Ginger rescuing her hat.

* The promo title featured on posters for the film, "C:R-1", was spoof of the promo title "M:I-2" for the film Mission: Impossible II.

* When Rocky enters the barn to find the chicken pie-making machine, he is awed by the size of it and says "Look at the size of that thing". This is a reference to Star Wars Episode IV: A New Hope. Wedge Antilles says this when he sees the Death Star for the first time.

* During the plane sequence, the Scottish chicken Mac shouts a few quotes from Scotty of Star Trek: The Original Series, such as "I cannot work miracles cap'n", "I'm giving her all she's got!", "A 'cling-on' (Klingon) cap'n," and "the engines can't take it!"

* After the plane has been assembled, the order is given: "Chocks Away!!". This refers to the triangular wedges used to hold an aeroplane back once its engines are running, which are then removed. In Chicken Run these are represented by bars of the triangular chocolate Toblerone, hence "Chocs Away".

* The coop that Ginger lives in is numbered 17, apparently an homage to Stalag 17.

* Fetcher's line "It's raining hen" during the scene where Rocky is teaching the chickens how to fly is a reference to the song "It's Raining Men"