"Most commonly, Holocaust survivors respond with habitual panic when exposed to triggers that in some way symbolize the Holocaust. Such Holocaust associated triggers may include any or all of the following: crowded trains, train stations, medical exams, a knock at the door, uniforms, extermination (of insects), yellow color, selections, gas, shower, barbed wire, discarding food (especially bread), fences, cruelty, barking dogs, any major disaster or discrimination, separations, the smell of burned flesh, closed spaces, an oven, standing in line, the freezing cold, music by Wagner, the German language and German products in general. Any of these stimuli may create a violent emotional response in the survivor who at that moment is thrown back to a life-threatening situation during the Holocaust. In addition, happy occasions such as weddings, Jewish holidays and family celebrations may also evoke sudden grief reactions, as they remind survivors of their immense loss and all the people who are absent because they were so brutally killed. As a consequence, there is frequently a contradictory effort both to remember and to forget, both to approach and to avoid the traumatic event in a compulsively repeated fashion. Like a broken record that is spinning around and around, intrusive experienced images and painful memories keep coming back while at the same time there is a conscious effort to avoid them and not to think about them."