The Ultimate Book Test
The spectator calls out a RANDOM page number in a normal, ungimmicked book. Out of thousands of possibilities - they think of ONE word on that page.
You write down a prediction before they even know what word it is. Remarkably - impossibly - your prediction is 100% correct.
But that's not all - not only did you write down the WORD, but you also predicted the exact dictionary position of that word: Page 248. Column 2. Word 7. And yes - the spectator can examine the books and the dictionary.