General wide view of synchronised dance display, part of Arirang celebrations in the May Day stadium in Pyongyang, North Korea, the backdrop shows sun rising from mountains

A group of Tai Chi practitioners performing in unison with swords in Longtan Park, Beijing, People's Republic of China.

Speeded up footage of people dancing the Charleston.

Close up of rows of children holding cards as part of display in Arirang celebrations in the May Day stadium in Pyongyang, North Korea, only the children's heads can be seen

A group of Tai Chi practitioners performing in unison in Longtan Park, Beijing, People's Republic of China.

A group of Tai Chi practitioners performing in unison with swords in Longtan Park, Beijing, People's Republic of China.

A group of Tai Chi practitioners performing in unison in Longtan Park, Beijing, People's Republic of China.

Mass of female dancers dressed in green, pink and yellow costumes dancing in rows in synchronised dance display as part of Arirang celebrations in the May Day stadium in Pyongyang, North Korea

A group of Tai Chi practitioners performing in unison using red folding fans in Longtan Park, Beijing, People's Republic of China.

A group of Tai Chi practitioners performing in unison with swords in Longtan Park, Beijing, People's Republic of China.

Rows of female dancers dressed in yellow with gold fans taking part in synchronised dance display as part of Arirang celebrations in Pyongyang, North Korea, backdrop is sun rising from mountains

A group of Tai Chi practitioners performing in unison in Longtan Park, Beijing, People's Republic of China.

Two people on a raft are pulled along by a speedboat. They then fall off the raft and into the water.

A group of Tai Chi practitioners performing in unison in Longtan Park, Beijing, People's Republic of China.

Sea of shining golden fans undulating held by dancers taking part in synchronised dance display as part of Arirang celebrations in Pyongyang, North Korea

Rows of coloured cards held up by small boys taking part in display as part of Arirang celebrations in the May Day stadium in Pyongyang, North Korea, the children's heads peer over the cards then quickly change the cards to show a different colour

Thailand, Wide slow motion shot of bats all flying in the same direction against a blue sky and distant hills.

Rows of female dancers dressed in green carrying large pink feathers taking part in synchronised dance display as part of Arirang celebrations in the May Day stadium in Pyongyang, North Korea

A group of Tai Chi practitioners performing in unison with swords in Longtan Park, Beijing, People's Republic of China.

A group of Tai Chi practitioners performing in unison with swords in Longtan Park, Beijing, People's Republic of China.

A group of Tai Chi practitioners performing in unison using red folding fans in Longtan Park, Beijing, People's Republic of China.

Dancers dressed in bright orange dancing with fans, taking part in synchronised dance display as part of Arirang celebrations in Pyongyang, North Korea, backdrop is sun rising from mountains

Rows of female dancers dressed in yellow and pink costumes dancing in synchronised dance display as part of Arirang celebrations in the May Day stadium in Pyongyang, North Korea

A group of Tai Chi practitioners performing in unison with swords in Longtan Park, Beijing, People's Republic of China.

Rows of female dancers holding blue material imitate undulating waves in the sea, the dancers are taking part in a synchronised dance display as part of Arirang celebrations in the May Day stadium in Pyongyang, North Korea

A marching band, featuring drummers and pipers, pass along a road.

A group of Tai Chi practitioners performing in unison with swords in Longtan Park, Beijing, People's Republic of China.

Black and white footage of folk dancers dancing in a group in white outfits in the 1930s.

Zoom out to wide shot of a group of Tai Chi practitioners performing in unison using red folding fans in Longtan Park, Beijing, People's Republic of China.

A group of Tai Chi practitioners performing in unison with swords in Longtan Park, Beijing, People's Republic of China.

High angle view of a group of Tai Chi practitioners performing in unison with swords in Longtan Park, Beijing, People's Republic of China.

Czech Republic: A sequence of a Spanish flamenco dancer surrounded by cheering people as he dances flamenco. Close up view of his shoes tapping on the hard floor.