The blast wave from an explosion travels at supersonic speeds and can cause severe injuries or death, even if you are not directly hit by the explosion itself. The blast wave can cause internal injuries, crush bones, and rupture eardrums. It can also throw people and objects through the air, causing further injuries.
If you are ever caught in an explosion, the best thing to do is to seek shelter immediately. If there is no shelter available, lie flat on the ground and cover your head and neck with your hands. This will help to protect you from the blast wave and flying debris.