Tarantino is no stranger to connecting in his own movies. Fans have looked at small cues from his movies and made fan theories of a shared Tarantino-verse from it. He himself confirmed it during interviews for The Hateful Eight that they are split into two separate universes.
What Tarantino means is that there is a "more real" universe where movies like Pulp Fiction and Reservoir Dogs fit into. Then there is the "movie" universe where Kill Bill and DeathProof exist. The clearest connection comes when Uma Thurman explains the Fox Force Five in Pulp Fiction - a pretty clear description of the Dead Viper Assassination Squad from Kill Bill.
Like other directors, Tarantino also uses certain items that have shown up throughout his movies. Red Apple-brand cigarettes appear in a lot of his movies as well as in From Dusk Till Dawn, which he wrote. The movie was directed by...Robert Rodriguez.
Another nod in From Dusk Til Dawn is Big Kahuna Burger, a fictional restaurant chain. It's most known for the bite taken out it by Samuel L. Jackson in Pulp Fiction. But did you know it's also included in a Rodriguez movie, The Adventures of Sharkboy and Lavagirl in 3-D?
There are deeper ties than burgers and smokes - actual characters fit into this shared universe. The one that ties it together is Earl McGraw, a Texas Ranger played by the late Michael Parks. He's in Kill Bill, From Dusk Till Dawn, and Planet Terror from Grindhouse.
Grindhouse, being a joint Tarantino/Rodriguez venture, bleeds into each other pretty well. Earl McGraw's daughter is Dakota Block, one of the main characters of Planet Terror. She also shows up in a cameo appearance on Death Proof, Tarantino's movie.
9. What's a Sheriff's Son Got To Do With All This?
McGraw also has a son, Edgar McGraw, who shows up in two Tarantino movies. He also shows up in one of the sequels to From Dusk Till Dawn. He's also in a deleted scene in Machete Kills, which is important to this theory.
Here's the thing about the cold-blooded Mexican killer played by Danny Trejo - he's also the uncle of the Cruz children from the Spy Kids movies. In the Spy Kids movies, he is also known as Machete, only his character is more tilted towards his spy gadgets and not his murdering.
Robert Rodriguez included Trejo/Machete as part of his idea of making something big with the actor. He wanted to make a character that was the " Mexican Jean-Claude Van Damme or Charles Bronson." Then he wanted to include it in all his movies - which he clearly did.
12. For Some Added Tarantino/Rodriguez Weirdness...
If you want another outrageous connection between Tarantino and Rodriguez, go back to From Dusk Till Dawn and Machete Kills. Both movies feature a particular type of gun that sits on your crotch. So an idea created by Tarantino's script made its way to one of Rodriguez's movies years later.
13. The Path From 'Kill Bill' To 'Spy Kids', Simplified
Tarantino has more out there connections than those with his good director buddy. He's gone on record saying that Django from Django Unchained is the ancestor of one famous '70s blacksploitation character. You might know him as John Shaft.
15. Tarantino's Universe (With Some Rodriguez Sprinkled In)