Vin Diesel has been showing off his tree walk for Guardians of the Galaxy on the set of Fast & Furious 7.

Diesel posted the barking mad video – which is entitled 'Tree Form Down Time' – on his Facebook page , and it features the star strolling around stilts that give him the seven-and-a-half foot needed to play Groot in the movie."There are no small roles, only small actors," he jokes to his Guardians and Fast 7 co-star Djimon Hounsou, continuing "I have one line in the movie, but that doesn't mean anything - I'm going to make it the best thing that I possibly can, even if it means taking Andy Serkis to a whole other level, which is what we want to do with our motion-capture."Both Guardians of the Galaxy and Fast & Furious 7 hit screens next summer.

Chris Tilly is the Entertainment Editor for IGN in the UK and something of a tree-hugger. He can be found talking nonsense on both Twitter and MyIGN