In agricultural tractors for example, as a general rule 40 to 50 percent of the value of the machine will be lost in the first quarter of the machine's life and by the halfway point of lifetime, from 70 to 75 percent of the value will be lost.
People with PTSD may feel constantly alert after the traumatic event. This is known as increased emotional arousal, and it can cause difficulty sleeping, outbursts of anger or irritability, and difficulty concentrating. They may find that they are constantly on guard and on the lookout for signs of danger.
Post-Traumatic Stress Disorder Symptoms, Causes and Effects. Post-traumatic stress disorder (PTSD) is brought on by witnessing a terrifying, usually life-threatening, event. Severe anxiety, flashbacks, uncontrollable thoughts and nightmares are common symptoms of the illness. These symptoms can worsen and last for years, so it is best to seek treatment for PTSD as soon as possible.