Ah, the Guinness World Records. The go-to authority on all current world records — no matter how extreme or trivial. For example, cracking walnuts against one's head. Is this a thing people do in their day-to-day lives? Is this a real hobby? Or is the sole purpose just to see if you can do it? Either way, it doesn't matter. S. Navin Kumar has just beat the record with a whopping 217 walnuts, and he has a giant forehead bruise to prove it.