Sometimes it doesn’t take much to cause a prison riot. Enter the 300 plus prisoners that started to riot in Ravenhall in Melbourne, Australia when a smoking ban was placed upon the inmates. As the riot steamrolled throughout the prison, causing an estimated $10 million or £6.4 million (Australia Dollars) in damage through fires and other physical destruction, the prison staff was evacuated and heavily armed police were brought in. Tear gas and high-pressure water cannons were used to bring things under control. By the time order was restored 15 hours later, there were no casualties and no prisoners had escaped. When a person is stripped of most freedoms, it seems that taking away even the most basic remaining freedoms is enough for unrest.