Currency note turns itself over

Effect: A currency note turns itself over. 

Secret: Hold the note in your left hand then fold it in half lengthways towards you. Next fold it in half away from you. Finally, fold the note in half again, this time towards your body. Now slowly unfold the note from the front, making each movement in the same direction. The note is now upside down! Strangely enough, this trick is more baffling if you do it really slowly but, like all tricks, you must practise it thoroughly to make sure you can do it perfectly before showing it to anyone.