Responders on CBRN incidents have a difficult task because they must tackle incidents effectively to avert a disaster. A malfunction of these teams can easily cause them to waver and can precipitate a full intervention. In order to prevent this, the staff goes through large-scale training which covers a wide variety of practice scenarios. Although the physical demands can be practiced in training very well, the mental aspects are often neglected. It is possible to use simulations or films and past experiences in the training, or to build at least a stress situation even if it will not come close enough to reality. In order to make the training experiences as realistic as possible, there are training suits from protective clothing manufacturers and measurement devices which can simulate an agent. But where is the stress? There is no problem if the protective suit breaks. Going on is the motto! Unfortunately, these types of training carry one evident problem, namely that there is no real CBRN danger and, therefore, they create less stress. When it is time for the real incident, everything looks a lot different. For this reason a new trend in international education is to work with real hazardous materials. The already well established “hot-education” of fire-fighters wearing SCBA for training purposes in a safe but real burning environment, is getting more accepted in the training of CBRN intervention-forces. Real PPE, the use of real measurement instruments which are showing “dangerous conditions” and the knowledge that a harmful substance is present, are coupled with confidence in equipment, a safety analysis and an emergency planning, which are preventing accidentally threatening situations.