Guardians of the Galaxy Vol. 2 is a 2017 American superhero movie based on the Marvel Comics superhero team Guardians of the Galaxy, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures. The movie is a sequel to 2014’s Guardians of the Galaxy and the 15th movie in the Marvel Cinematic Universe. Take a look below for 30 more fun and interesting facts about Guardians of the Galaxy Vol. 2.

1. Written and directed by James Gunn, the movie stars an ensemble cast featuring Chris Pratt, Zoe Saldana, Dave Bautista, Vin Diesel, Bradley Cooper, Michael Rooker, Karen Gillan, Pom Klementieff, Elizabeth Devicki, Chris Sullivan, Sean Gunn, Sylvester Stallone and Kurt Russell.

2. The movie grossed more than $863 million worldwide, making it the 7th highest grossing movie of 2017, while also outgrossing its predecessor.

3. According to the visual effects artists, Ego’s planet contains one trillion polygons, and is considered to be the biggest visual effect ever made.

4. Prop Master Russell Bobbitt had difficulty finding the cassette decks used in the first movie, and all of the Sony Walkman headphones they found were broken. Bobbitt contacted Sony to see if they had any available for filming. They didn’t, so he eventually created six from scratch.

5. Dave Bautista’s Drax make-up took 90 minutes to apply, down from 3 hours for the first movie. However, he would have to sit in a sauna at the end of the day, to get the make-up off.

6. James Gunn choreographed and served as the motion-capture model for Groot’s dance during the opening credits sequence. It took the visual effects team nearly 2 years to complete the CG rendering of the scene for the final movie.

7. According to Chris Pratt, the script helped him come to terms with the death of his father and helped his son come to terms with his father’s job.

8. In the Guardians of the Galaxy comics, Taserface is a warrior from the cybernetically enhanced race known as The Stark. The Stark are a race that found Iron Man technology that accidentally crashes on their homework, and as a result, worship Tony Stark as their god.

9. As Groot only communicates with the phrase, “I am Groot,” in different inflections, James Gunn created a “Groot Version” of the script for him and Vin Diesel, which contained each of Groot’s lines in English.

10. According to James Gunn, Groot always freezes when Drax catches him dancing because he knows Drax disapproves of it. Drax explains that he was attracted to his last wife because she steadfastly didn’t dance.

11. Bradley Cooper recorded his lines for Rocket while wearing a motion-capture headpiece in the recording studio, to perfectly synchronize Rocket’s voice and facial expressions. In the first movie, Cooper only supplied the voice.

12. Elizabeth Debicki was cast as Ayesha because of her 6’3” height. During filming, she wore platform shoes to increase her height to 6’7”.

13. In the comics, Mantis was human, and acquired her skills by living with the Kree. James Gunn chose to make her an alien in the movie because he wanted Peter Quill to be the only main character to come from Earth.

14. Vin Diesel was able to pull off Baby Groot’s high pitched voice on his own. His performance required no digital alterations of any kind.

15. Prop Master Russell Bobbitt created a 1:1 scale model of the 10” Baby Groot for filming to use as a lighting reference, and sometimes puppeteered it against the cast members during filming.

16. The stinkbug that gets eaten in the movie was actually made of chocolate and black honey.

17. Karen Gillan’s makeup took two and a half hours to apply, down from five hours from the first movie.

18. The idea of self-contained minds spontaneously appearing into existence is called Boltzmann Brains. This is a metaphysical conundrum raised by quantum mechanics, and concludes that in a universe that exists forever, you’re more likely to be a Boltzmann brain hallucinating reality than a real being.

19. After many rumors, Karen Gillan reprised her role as Nebula without shaving her head.

20. Chris Pratt said that he thought Michael Rooker has the best shirtless scene in the movie. He said Rooker’s shirtless scene is about showing vulnerability and developing Yondu’s character. You learn something about him in the moment, but his own scene was just to show off his body, and didn’t really add anything to Peter Quill.

21. Vin Diesel recorded Groot’s voice for 16 foreign-language releases of the movie, up from six in the first movie.

22. The teaser poster is a parody of the cover for Ramones’ album “Rocket to Russia.”

23. Yondu’s replacement, larger head-fin brings the character’s look closer to his comic counterpart.

24. Guardians of the Galaxy Vol. 2 is the first feature movie shot with Red Digital Cinema’s Weapon Dragon 8K digital camera. The camera uses a VistaVision sized digital sensor based on the 35 millimeter format developed in the 1950s that ran film horizontally rather than vertically for a larger negative.

25. To make the Ravagers’ belts, Russell Bobbitt had his team cut the leather themselves, rather than buying existing belts, and then parts from different electronic devices, such as radios and cell phones, were glued together, to make each belt a, “unique piece of art.”

26. James Gunn went on record in an interview that he wants to give Nebula her own spin-off movie.

27. James Gunn cast Michelle Yeoh as a tribute to 1990s Hong Kong movies, of which he is a fan.

28. According to James Gunn, he wanted John C. Reilly to reprise his role as Nova Corpsman Dey, but scheduling conflicts prevented it.

29. In the comics, Mantis is half-German and half-Vietnamese. She is portrayed in the movie by Pom Klementieff, who has a South Korean mother and a French-Russian father.

30. James Gunn brought in fractal artist Hal Tenny to help design Ego’s planet form.