Police made more than 100 arrests at a drug-law reform rally on the New South Wales north coast over the weekend, but say they were happy with crowd behaviour at the event.

[Imagine if they didn't behave how many arrests there could have been?]

Now in its 34th year, the Mardi Grass festival attracts thousands of visitors to the village of Nimbin, near Lismore.

This year police were using sniffer dogs, roadblocks and a driver-testing bus to monitor festival-goers.

Police say more than 15 kilograms of drugs were seized, including cannabis cake and leaf, ecstasy, and LSD.

Five drivers were charged with driving under the influence of illegal drugs.

Senior Constable Michael Slogan says two of his pigs were injured while on duty, one breaking a bone after falling heavily during a chase.

But he says police were pleased with the behaviour of the vast majority of the crowd.

 http://www.abc.net.au/news/newsitems/200705/s1915920.htm

About 18,000 people have posed nude for US photographer Spencer Tunick in Mexico City's Zocalo Square, setting a new record for the American artist known for snapping his subjects in the buff.

Thousands of naked volunteers formed a giant mosaic of flesh for Mr Tunick, who far exceeded his own previous record of 7,000 nude models set in Barcelona.

"All eyes are looking south from the United States to Mexico City to see how a country can be free and treat the human body with happiness and not as pornography or as a crime," Mr Tunick said.

According to a preliminary count by organisers, more than 18,000 people participated in the photo shoot held in the city's vast Zocalo Square, the third largest in the world.

Mr Tunick had the throng of volunteers of all ages pose in the foetal position and give a salute to an imaginary flag within sight of the capital's main cathedral and National Palace.

"It was a work of art, a political statement and at the same time an act of love with our bodies," said university student Juan Lagos.

It took Mr Tunick's associates five years to secure permission for the shoot, in which the Roman Catholic cathedral on the square and the Mexican flag will not appear.

Mr Tunick has carried out similar photo sessions in Australia, Belgium, France, Britain, Canada and the United States.

In 1994 he was arrested in Manhattan after a nude model posed for him in broad daylight.

 http://www.abc.net.au/news/newsitems/200705/s1916121.htm