No, it is not advisable to open your mouth during an explosion. In fact, it is recommended to keep your mouth closed and cover your nose if you are near an explosion or in a situation where there may be debris, dust, or harmful substances in the air.
Opening your mouth during an explosion can potentially lead to inhaling harmful particles, debris, or gases that could cause injury or harm to your respiratory system. Additionally, closing your mouth and covering your nose can help reduce the risk of inhaling smoke, dust, or other airborne substances that may be present in the aftermath of an explosion.
In general, during any hazardous event like an explosion, it is important to prioritize your safety and follow guidelines provided by emergency responders or local authorities. This may include seeking shelter, moving away from the affected area, or taking necessary precautions to protect yourself from potential harm.