How Mad Are You: Most people get anxious in their daily lives, but where does the line between sanity and madness lie and is it easy to recognise? Do you ever worry about leaving the gas on, or arrive at work and worry that you've not locked your front door? Perhaps you get anxious before having to give a talk or wake up in the morning and are barely able to drag yourself out of bed? These are normal reactions to the twists and turns of modern life. But all these actions can also be seen as symptoms of mental illness. Those with Obsessive Compulsive Disorder (OCD) know this only too well. Classic symptoms of the illness include repeated checking of things like the gas and door locks.