"WHAT IS LAUGHTER? The laugh is a painful spasm affecting the chest, neck, and face. When laughing, a subject experiences a significant decline in reflex response and awareness of his surroundings. Vision in laughing subjects may be blurred. They may experience salivation, watering in the eyes, nasal congestion, shortness of breath, or involuntary animal-like vocalisations. Laughter substantially reduces combat effectiveness, often fatally. HOW IS LAUGHTER INDUCED? The laugh ...may be induced by certain chemical weapons. However, we are also developing the capacity to induce laughter through the combination of words, noises, and actions. We can turn any part of your language into the laughter-weapon. Even the most basic movements of your body – eg, coitus or defecation – are not safe. HOW CAN I PREVENT MYSELF FROM LAUGHING? You can not prevent yourself from laughing. If your people do not leave Việt Nam, we promise to spread joy and laughter among your ranks."