Cardiff credited the installation to bespoke props company Wild Creations, the team behind July's infamous Sharknado 3 stunt, via Twitter this morning. It stated that the team had worked through the night to create the Rugby World Cup illusion.
Phil Bale, the City of Cardiff Council leader, said: "The Ball in the Wall is a significant statement which says Rugby World Cup 2015 has arrived in Cardiff and we are ready for it."
He added that the city will host eight matches of the tournament at its Millennium Stadium, as well as a fanzone with a capacity of 10,000. The latter promises acitvities such as Fijian fire eating, a kicking cage, live music and interactive stations from the Rugby World Cup official partners.
More Rugby World Cup news: Five Rugby World Cup activations
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