I thought this was fantastic, the way everyone is able to climb on top of each other, and of course there are some falls as well, and apparently there is always ambulances standing by just in case. In the video below you will be able to see how the people achieve these towers, and you will also see when something goes wrong they really do come tumbling down.
A Bit of information about Castell if you are interested.
A castell is a human tower built traditionally in festivals at many locations within Catalonia. At these festivals, several colles castelleres or teams often succeed in building and dismantling a tower’s structure. On November 16, 2010, castells were declared by UNESCO to be amongst the Masterpieces of the Oral and Intangible Heritage of Humanity.
In Catalan the word castell means castle.
A castell is considered a success when stages of its assembling and disassembling, can be done in complete succession. The assembly is complete once all castellers have climbed into their designated places, and the enxaneta climbs into place at the top and raises one hand with four fingers erect, in a gesture said to symbolize the stripes of the Catalan flag. The enxaneta then climbs down the other side of the castell, after which the remaining levels of castellers descend in highest-to-lowest order until all have reached safety. Wikipedia.
In the city of Tarragona, Spain, castellers gather every two years to see who can build the highest, most intricate human castles. This uniquely Catalan tradition requires astonishing strength, finesse, and balance. Not to mention courage. by Mike Randolph