One of the most memorable moments of the entire Jurassic Park/Jurassic World franchise is when Nedry (Wayne Knight) is trying to escape the park and island after stealing dino DNA, and he comes across a dilophosaurus, who spits all over him and eventually eats him. Well, everyone’s favorite spitting dinosaur is back, and in the home release of Jurassic World: Dominion, we finally learn how they make the spit.

In one of the special features, titled “Spit Take: The Return of the Dilophosaurus,” the cast and crew discuss the iconic spitting dino, which includes some behind the scenes on what the spit is made from and how they shoot it onto the cast.

“This is our main spit substance, a material called methylcellulose, which is a food thickening agent, which they use in milkshakes at your local burger joint,” said Chris Clarke, the special effects senior technician on Dominion. “I noticed in the original film, [the dilophosaurus] first spits, and [Nedry] comes and grabs his shirt, and it all strings up. So there’s a substance we use in the film industry a lot called ‘ultra slime.’ And any time you see anything stringy in a film, it’s this stuff. It just looks like mucus.”

Clarke showed off how the dilophosaurus spit is delivered–which you can see a screenshot of above–and it’s a hand-powered air pump connected to a long metal tube. Of course, during the scenes when someone is getting “spit on,” Clarke is just off camera with his contraption, squirting people in the face.

Jurassic World: Dominion is available digitally at retailers, like Movies Anywhere, and physically now. The home release contains the short film “Battle at Big Rock,” and 10 features about making the movie. Additionally, there is the theatrical release of the movie, which comes in at 2 hours and 26 minutes, and the extended version, which has a runtime of 2 hours and 40 minutes. That’s 14 minutes more of dinosaurs and action.

Special features list:

• Theatrical cut
• Extended cut
• Battle at Big Rock short film
• A New Breed of VFX feature
• Together for the first time feature
• Underground dino market feature
• Mayhem in Malta feature
• Spit Take: The return of the dilophosaurus feature
• Inside the dimetrodon feature
• Creating a plague feature
• Passing the beta feature
• Giga-bite feature
• Final night feature

All of these features, including the extended cut, are available on Movies Anywhere as well, with prices of the movie starting at $20, so you can take the movie on the go and watch from your TV, tablet, or phone. Additionally, the film is available at Walmart , Target , Best Buy , and Amazon , and physical copies of the movie come with a digital code for Movies Anywhere.