Volcanic bombs are dangerous because they are molten rock fragments ejected during volcanic eruptions. These bombs can vary in size from a few centimeters to several meters in diameter and can be thrown several kilometers away from the volcano. Due to their high temperatures and velocities, volcanic bombs can cause injuries, start fires, and damage property when they impact the ground. Additionally, the impact force of these bombs can lead to explosions and secondary hazards, making them a significant danger to anyone near an erupting volcano.