From Newslite:

Shoppers and office workers in Zurich were left part bemused, part terrified when hundreds of people instantly collapsed to the floor.

All across the city green demonstrators simulated dropping down dead at exactly 12.15pm yesterday – to protest about a series of proposed nuclear power stations.

The campaigners say their action simulated a nuclear radioactivity disaster which could happen in Switzerland, if the stations are built.

If they really wanted to simulate a nuclear disaster, they could have ripped chunks of their flesh and hair out while screaming in agony also…but I guess they aren’t THAT committed.  Posers.