A cool video has emerged of an impressive human pyramid at La Mercè 2014 in Barcelona, Spain earlier this month.

In an impressive display of agility and strength, a large group of acrobats in matching outfits can be seen building a huge tower by standing on one another’s shoulders.

The stunt known as "4 de 9 amb folre" (9 levels of 4 people) was performed by Castellers de Barcelona in Sant Jaume Square on "diada castellera" on Sunday 21st September.

A cool video has emerged of an impressive human pyramid at La Mercè 2014 in Barcelona, Spain earlier this month.

In an impressive display of agility and strength, a large group of acrobats in matching outfits can be seen building a huge tower by standing on one another’s shoulders.

The stunt known as "4 de 9 amb folre" (9 levels of 4 people with cover) was performed by Castellers de Barcelona in Sant Jaume Square on "diada castellera" (human castles day) on Sunday 21st September.