This is brilliant, and dead easy to pull off. Get into the boss fight with Gandrayda on the Pirate Homeworld. Wait until she takes the fight outside and transforms into Ghor - the big robot chap. Now fly past her using repeated Screw Attacking. All being well, she’ll nab you with an elastic rope - at which point the game will go nuts. When you’re dropped, you’re in Morph Ball mode - but with an upright Samus. It looks bizarre: try rolling around, using Morph Ball bombs and the B-boost. When you unmorph, the game will be back to normal, but you’ll never forget those brief moments of Metroid madness.