Many teenagers around the world are liable to display signs of rebelliousness and similar sentiments. Then there is Kerim Ahmetspahic. It's unclear if the 16-year-old is stubborn, but he is certainly hard-headed.
A young taekwondo champion has headbutted his way through a whopping 111 building blocks and into the Guinness Book of World Records. Kerim Ahmetspahic, 16, from Bosnia, broke the slabs, which were stacked in 16 columns, in just 35 seconds.
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