The scenes at Auburn were originally supposed to be shot on location on the campus of Auburn University in Auburn, Alabama, but the school officials asked for script approval and the production did not have time to wait, so they filmed the scenes at Huntingdon College in Montgomery, Alabama instead.
Even though Young Edward lands in Korea, the ventriloquist and his puppet speak in Tagalog (language of the Philippines) while the Siamese twins and Edward speak in Cantonese (a Chinese dialect). The soldiers who pull the ventriloquist off the stage speak Mandarin Chinese (language of mainland China and Taiwan) while the other soldiers speak in Korean.
Young Edward becomes a traveling salesman for a company that sells hands with metal tools as fingers, all held together by a plastic base. The crew were aware that people would draw connections between it and Edward Scissorhands (1990), and therefore purposely did not include scissors in the design.
The actor who plays the banjo in Spectre, Billy Redden, is playing the iconic song "Dueling Banjos" from the film Deliverance (1972) when Edward Bloom arrives for the first time. Redden played Lonnie in Deliverance (1972).
When Edward Bloom arrives home from the War in his dress uniform, the patch on his shoulder shows that he was assigned to the 187th Airborne Regimental Combat Team, known as the Rakkasans. Which is located in Ft. Campbell, Kentucky/Tennessee. Home of the 101st Airborne.
Joseph Campbell's book, "The Hero With A Thousand Faces," appears in this film. It is shown first on a sleeping Edward Bloom (before being picked up and placed on the nightstand by Josephine) and then later still on the nightstand during a scene between Ed and Will. Daniel Wallace is an outspoken fan of Campbell's.
Three years is a prominent amount of time that appears in the film on multiple occasions. Examples include Will and his father, Edward, not talking to each other for three years, Edward mentioned he had to stay in his bed for three years, he worked for Calloway's circus for three years, and he mentioned he had to stay in the army for three years.
The two portraits on the walls in the bank scene are actually of the founders of Bishop-Parker Furniture Co., Montgomery, Alabama. Several props were purchased there. The buyer noticed the portraits and thought they would pass as old bankers.
The trivia items below may give away important plot points.
In the middle of the lettered board in the bank that Norther Winslow robs, it reads "ROMANS 12:1-2." This refers to the passages in the Bible that says, "Therefore, I urge you, brothers, in view of God's mercy, to offer your bodies as living sacrifices, holy and pleasing to God, this is your spiritual act of worship. Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God's will is--his good, pleasing and perfect will."
Steve Buscemi's character at one point very casually and successfully, robs a bank, but with little profit. By contrast with Reservoir Dogs (1992), Buscemi also robs a store, but it turns into a panicked, bloody mess, and receives a very large profit.