Check out Bradley Cooper and Vin Diesel as a genetically-engineered raccoon and muscular tree in this new Guardians of the Galaxy featurette.

In the featurette Cooper describes his character of Rocket the raccoon saying, "Rocket has some real anger issues!"

While Diesel thinks his character is truly unique, "Groot is one of the strangest characters that Marvel has ever put on film."

Catch Guardians of the Galaxy in cinemas now.