As most fans of the films know, the Marvel Cinematic Universe contains a lot of Easter eggs. In addition to a lot of different hints that foreshadow characters and events to come, there are some things included in the films that are meant to just be hidden jokes for those who know and are paying close attention.

Guardians of the Galaxy is full of jokes, but there's one a lot of fans might have missed. During the credits for the first film, there's an assurance that "no raccoons or tree creatures were harmed during the making of this film," a clear reference to Rocket Raccoon and Groot, who are brought to life using CGI. A similar joke happened in the credits for Guardians of the Galaxy Vol. 2, which saw names changed to "I am Groot."

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Check out the video below for more of the best jokes hidden in the MCU.

There will certainly be a lot more hidden jokes in future MCU movies. At this time, there are sequels to Black PantherDoctor Strange and Guardians of the Galaxy Vol. 2 in development, while there are new films focused on Black WidowShang-Chi and The Eternals also set to release sooner rather than later. Spider-Man: Far From Home will also likely feature a lot of hidden jokes, as is befitting as Spider-Man film, when that kicks off the next phase of the MCU.

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Directed by Joe and Anthony Russo, Avengers: Endgame stars Robert Downey Jr., Josh Brolin, Mark Ruffalo, Tom Hiddleston, Chris Evans, Chris Hemsworth, Jeremy Renner, Chris Pratt, Elizabeth Olsen, Chadwick Boseman, Sebastian Stan, Benedict Cumberbatch, Paul Bettany, Samuel L. Jackson, Cobie Smulders, Benedict Wong, Zoe Saldana, Karen Gillan, Vin Diesel, Dave Bautista, Pom Klementieff, Scarlett Johansson, Tom Holland and Anthony Mackie. The film arrives April 26.