This can be very dangerous because the pelvis supports many internal Organs.

http://en.wikipedia.org/wiki/Pelvic_fracture

This can be very dangerous because the pelvis supports many internal organs and can damage these organs. Other parts of the body such as the head and chest usually occur due to pelvic fractures. Falling is one of the most common causes of a pelvic fracture. Therefore, proper precautions should be taken to prevent this from happening.