A sense of doom or impending danger 4. The number of arguments which they make When a lot of people picture a fire extinguisher, the picture that's called to mind belongs to a CO2 extinguisher. With their large, metals cylinders of bright red and hard horns, these fire extinguishers have been installed as an emergency measure in homes and businesses for generations. Carbon dioxide extinguishers could be differentiated from similar extinguishers through the lack of any kind of pressure gauge at the top of the tank. People with an anxiety disorder often have co-occurring mental health problems, such as depression, and this can increase serious risks like suicide. Often severe anxiety disorder symptoms and panic attacks are a warning sign and increase the risk of suicide.