But in order for it to work, you need to think of a memory.Not just any memory, a very happy memory, a very powerful memory." On his first try to expel a Boggart Dementor with his wand, Harry fainted.He revealed his ""happy memory"" - the first time he rode a broom, but that was inadequate and not strong enough.Out of position, Shrek followed Fiona after taking Puss"" advice, to show her who he really was - to "fix everything." The Fairy Godmother had an alternative idea - she gave Harold another love potion for Fiona to drink, and promised - "she""ll fall in love with the first man she kisses - which will be Charming.In one of the film""s major posters, Max and his muscular evil nemesis were partially viewed on opposite sides of the frame - mirror images of each other.