Now pull the corners outwards and downwards, while maintaining the pinch with your index fingers. This will cause the cover to rip first, then each of the pages, one after the other. The hardest part is the initial rip; after that tear in one motion for full effect!
Obviously, the thicker the phonebook, the more finger strength the trick requires. However, you can challenge your friends to do this: without the proper technique, it is practically impossible to achieve!
Warning though: there soon won't be any phonebooks left in your house if you enjoy this trick as much as I do. Thank god for the internet!
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