The government in Spain is in full-panic mode. They are trying to label the protesters as terrorists and are advising that anyone should stay out of Madrid center tomorrow.

So far, the protesters have only said that they do not want to start the violence, but if something strange happens and riot police starts attacking people(like in the last protest) there are going to be a very violent response.

Athens has a population of 3 million.

Madrid has a population of 7 million.

If something goes bad, there could be a social unrest like no one has ever seen in Spain's young democracy.