In any case, jumping off a high-speed bicycle carries a very high risk of injury, especially without the protection of any safety equipment (such as helmets, protective gear, etc.). The following are some **Principles of action that can theoretically reduce the risk**, but it must be emphasized: **Injuries cannot be completely avoided**, and it is strongly recommended to give priority to safe parking by deceleration or braking, rather than actively jumping out of the car. --- ###**Emergency recommendations in high-risk scenarios (for reference only in extreme cases)** 1. **Reduce the speed** -Try to slow down by braking or friction (such as rubbing the ground with the soles of your shoes). The lower the speed, the smaller the landing impact. 2. **Choose the timing and direction of landing** -**Avoid jumping forward**: Inertia may cause tumbling or head impact. -**Sideways dumping**: Try to make the body fall to the side of the bicycle, using the arms and legs to dissipate the impact force (similar to the principle of “low-side falling” on a motorcycle). 3. **Buffer action (requires instinctive response)** -**Bend your knees and roll**: Bend your knees and elbows when landing, try to land with your back or shoulders and roll along the trend to disperse the impact (similar to parkour landing and rolling). -**Avoid straightening your limbs**: A stiff body can increase the risk of fractures. 4. **Environment selection** -If possible, give priority to landing on soft ground such as grass and soil, avoiding hard roads or obstacles. --- ###**Key Warnings** -**Head protection is the most critical**: Without a helmet, any head impact can cause serious injury or even death. -**Speed determines injury**: Even if the action is correct, jumping at a speed of more than 20 km/h may still cause fractures, abrasions or sprains. -**Do not take the initiative to try**: This operation is only used as a theoretical analysis in extreme cases. In reality, priority should be given to controlling the speed and wearing protective gear. --- ###**Safe alternative** 1. **Early prevention**: Check the condition of bicycle brakes and tires to avoid high-speed out-of-control. 2. **Wearing protective gear**: Helmets, knee pads, and gloves can significantly reduce injuries. 3. **Practice emergency skills**: Learn how to fall in a safe environment (such as judo or parkour basics). Please always put safety first and don't risk trying dangerous actions!