The Red Stapler: The UC Santa Cruz Banana Slugs T-shirt that Vincent wears became a hot seller after appearing in the movie.
Shout Out: Tarantino has stated that the briefcase was originally meant to be the same MacGuffin suitcase of diamonds from Reservoir Dogs until they changed it to a glowing object instead. This itself is referenced in The Usual Suspects, where the suitcase containing their dossiers gives off this glow because of the yellow paper used.
The scene where Butch is stopping at a crosswalk and Marcellus walks by is very similar to a scene in Psycho.
Jules' expanded version of Ezekiel 25:17 directly quotes the Sonny Chiba film Karate Kiba (released in the West as The Bodyguard—with "and you will know my name is THE LORD" replacing "and they shall know that I am Chiba the Bodyguard".
Charley Varrick: In that film, Boyle tells Young that their bosses will most likely go to work on Young with "a pair of pliers and a blowtorch" for failure on the job and possible betrayal.
Throw It In: Tarantino originally wanted Jules to have an actual afro, but the wig wrangler got a jheri curl wig by mistake. Jackson thought it was perfect for the character and insisted they keep it.
In case you were wondering what Wallace wanted the pliers and blowtorch for: The pliers are used to remove various things, starting with teeth, progressing to fingernails and toenails. Then the fingers and toes themselves. Then you get to the fleshy bits, such as the tongue. Then the ears. What's left of his genitals go next. Due to them being mostly destroyed by the shotgun, the blowtorch might be used to simply burn them away. The blowtorch is used to cauterize the wounds to prevent the victim from bleeding to death. Finally, when you've ripped off as much as you can, the blowtorch is applied to the head. The heat causes the eyes to expand, which sort of half melt, half burst. Finally, the brain basically boils in the cerebral fluid, and the victim, much to his bliss, is dead. This method was a favorite of Saddam Hussein.
Vincent Vega: Daniel Day-Lewis actively campaigned for the part, but Tarantino turned him down. He initially wanted Michael Madsen to play the goofy hitman, but the latter chose to pursue other project instead (a decision he later regretted). Now just imagine Vincent being played by those two instead of John Travolta...
Jules Winnfield: The quintessential Samuel L. Jackson role, but he almost lost this part to Paul Calderón. He eventually kept it, with Calderón playing Paul (Marsellus's right-hand man) instead.
Ringo: Johnny Depp could have taken Tim Roth's part, but unlike Jules or Vincent it was always a fat chance.
Lance/Jody: According to Courtney Love, she and Kurt Cobain were offered the role. According to Tarantino however, it's bullshit.
Jimmie: Tarantino had written the role with Steve Buscemi in mind but Buscemi had to turn it down due to scheduling conflicts. Tarantino himself ended up filling the role and Buscemi was given a cameo appearance as the Buddy Holly waiter at Jack-Rabbit Slims.
