Major trauma is any event that can cause very serious injury, such as:

• A fall from more than 10 ft (3.1 m)[more than 5 ft (1.5 m) for children under 2 years and adults over 65].
• A car crash in which any vehicle involved was going more than 20 miles (32 km) per hour.
• Any event that causes severe bleeding that you cannot control.
• Any event forceful enough to badly break a large bone (like an arm bone or leg bone).