In fight sports you often of combatants having hard heads, but this particular Guinness World Record attempt gives an entirely new meaning to the term.

And please do not try this at home.

On the sixteenth episode of the Italian edition of the Guinness World Records show that aired on May 2016, martial artists Oliver Grimsehl of Germany (wearing the white gi) and Michael Gonzales (sporting Bruce Lee’s iconic tracksuit) competed head to head..literally to see whom could break the most concrete blocks by forward flipping onto their head within a single minute.

Michael Gonzales set the original record back in 2013 on the Guinness World Records Unleashed show in Los Angeles which saw him break an impressive 43 blocks and in this challenge he has every intention of keeping the title no matter how bad of a headache he may get the next day.

Who do you think will have the hardest head between these two martial artists and who will take the title home, find out how it unfolds below.

Check out some other martial arts related Guinness World records below

Cung Le attempts the world record for most eggs crushed with kicks

Three Taekwondo Black Belts attempt the highest assisted kick world record

Dennis Bermudez attempts bizarre world record

Guinness World Records, known from its inception in 1955 until 1998 as The Guinness Book of Records and in previous U.S. editions as The Guinness Book of World Records, is a reference book published annually, listing world records and national records, both of human achievements and the extremes of the natural world. The book itself holds a world record, as the best-selling copyrighted book of all time. As of the 2016 edition, it is now in its 62nd year of publication. The international franchise has extended beyond print to include television series and museums. [source : wiki]