Ever sat opposite someone and wondered: what's going on inside their head? Well Pixar's latest animated masterpiece Inside Out takes us on a journey like no other, introducing us to the emotions living inside the cranium of 12-year-old girl Riley.
With Inside Out due for release on 24th July, we've been thinking: which other mind-melting movies have taken us inside someone's noggin? Here are some of our favourites...
The Wizard of Oz
The pitch: Kansas farm girl Dorothy (Judy Garland) is swept over the rainbow to the wonderful Technicolour world of Oz in this timeless fantasy classic.
Trippiest moment: Dorothy wakes up to realise that her journey to Oz was in fact all a dream, and her loyal companions the Tin Man, the Cowardly Lion and the Scarecrow, as well as the Wicked Witch, were all inspired by people in the real world. Even so, it's a happy ending, one that reminds us: "There's no place like home."
Being John Malkovich
The pitch: Ripped straight from the twisted minds of Spike Jonze and Charlie Kaufman, this offbeat movie sees lonely, sad-sack puppeteer Craig (John Cusack) discover a portal that takes him inside the head of actor John Malkovich (playing himself).
Trippiest moment: Having discovered the portal, Malkovich tries it out himself. Cue a hilariously funny and surreal sequence where everyone is played by him, women included, and where the only word spoken is 'Malkovich.'
The pitch: The Wachowskis' groundbreaking sci-fi action-thriller melds philosophy with punchy action, as computer hacker Neo (Keanu Reeves) discovers the 'real' world is a simulation operated by evil machines.
Trippiest moment: Neo's eyes are opened by trench coat-wearing Morpheus (Laurence Fishburne), as he discovers the world we perceive as real is called the Matrix. In reality, people have been born in huge battery farms amidst a sprawling futuristic wasteland. Woah, dude.
Eternal Sunshine of the Spotless Mind
The pitch: A romantic drama quite unlike any other, Michel Gondry's headscrambling movie stars Jim Carrey as Joel, a man who decides to erase the memories of his girlfriend Clem (Kate Winslet). However, Joel changes his mind midway through the process...
Trippiest moment: Joel tries to hide his memories of Clem in a part of his mind where the erasure team won't find them. Problem is, he ends up reverting to being a baby! Doh!
The pitch: Christopher Nolan's thrilling blockbuster bends time, space and our own feeble minds, as Dom Cobb (Leonardo DiCaprio) leads an elite team on a heist – within the target's mind.
Trippiest moment: Ariadne (Ellen Page) discovers she's inside a dream – and promptly obliterates the laws of physics by bending a Paris street on top of itself. Why can't we do that for real?