A taekwondo player from Bosnia and Herzegovina has become an internet sensation after headbutting 111 building blocks to make it into the Guinness Book of World Records.
Kerim Ahmetspahic broke slabs stacked in 16 columns in just 35 seconds to help publicise the Taekwondo Humanitarian Foundation (THF).
Footage of the impressive challenge, which took place in the Bosnian city of Visoko, shows 16-year-old Ahmetspahic rolling over the piles before splitting each one with his head.
A Guinness Book of World Records adjudicator was present at the event.
The book is published annually, listing world and national records of human achievement.
"I still have more power," said Ahmetspahic after completing the challenge, according to the Daily Mail.
"I wish to thank all the people who helped me achieve this - my parents and my coach Edin Kajevic."
The World Taekwondo Federation currerntly runs the "Taekwondo Humanitarian Foundation Challenge".
Those willing to take part break a wooden board on camera, pledge a donation to the THF and challenge someone else to do the same.
The THF teaches the sport to refugees worldwide.