Samenvatting
Feelings of insecurity are caused by the idea that something can happen to you and the idea that you can not do anything against it. The starker the feelings are, the more insecure people feel themselves. Women feel often more insecure than men, and old men feel more insecure than young men. The last group think wrongly that nothing can happen to them. The personnel in public transport, in particular the controlling personnel, have reasons to feel unsafe themselves. They are confronted with aggressiveness of the passengers. Some experiences of vulnerability and fear, loneliness, and not able to cope with the situation are described.