You clip two paperclips onto the ends of a banknote. You pull on both sides. The paperclips fly through the air, and suddenly hang linked together. A classic from 1950, and the first trick every magician-in-training learns.
Watch this trick in action
The technique: geometry does the work
This trick is not sleight of hand, it's pure geometry. The note is folded in a specific S-shape so both paperclips mechanically touch the moment the note is pulled tight. When the paperclips fly free, they automatically lock into each other.
It works every time, with any currency and any paper of similar stiffness. The difficulty isn't the execution but the presentation: pretending something is happening that actually happens by itself.
- ✦Fold the note in an S-shape (Z-fold)
- ✦Place the first paperclip on the first fold, near the other side
- ✦Place the second paperclip on the second fold, both biting
- ✦Pull the ends sharply tight in one quick motion
The psychology: it seems too fast to see
The trick happens in a fraction of a second, faster than the eye can follow. This isn't coincidence: the brain doesn't register events under about 50 milliseconds. When the spectator sees the paperclips 'fly through the air', the brain fills in the intermediate moments itself. And those imagined intermediate moments contain no logical explanation.
The effect is amplified because the spectator themselves applies the tension to the note. It feels like they caused the magic. This sense of involvement makes the trick unforgettable.
A household trick with the impact of a grand illusion. Try it yourself, and discover how little dexterity you need to amaze someone.