Firing bullets into the air, often referred to as "celebratory gunfire," is dangerous and not safe at all. The bullets that are fired into the air will eventually come back down due to the force of gravity. This poses a significant risk to people and property on the ground. Here's why it's dangerous:

1. *Terminal Velocity:* When bullets are fired straight up, they eventually reach a point where their upward velocity is overcome by gravity, causing them to slow down and eventually stop. At this point, the bullet will begin to fall back down. However, as they fall, they regain speed due to gravity, and they can reach a high enough velocity to cause serious injury or even death upon impact.

2. *Unpredictable Trajectory:* The trajectory of a falling bullet is highly unpredictable due to factors like wind, air resistance, and the bullet's shape. This means that bullets can land far away from the point of origin and potentially hit people or objects unexpectedly.

3. *Injury and Death:* Falling bullets can cause significant harm. Even though they may not be traveling as fast as when they were first fired, their impact can still be deadly. Bullets falling from a considerable height can reach speeds that are lethal upon impact.

4. *Property Damage:* Bullets falling from the sky can also cause damage to vehicles, buildings, and other property, leading to costly repairs and potential legal consequences for those responsible.

5. *Legal Consequences:* Many jurisdictions have laws against firing guns into the air due to the risks involved. Engaging in celebratory gunfire can lead to criminal charges, especially if injury or property damage occurs as a result.

In summary, firing bullets into the air is extremely unsafe and should never be done. The risks of injury, death, and property damage are very real, and the consequences can be severe. It's important to always handle firearms responsibly and follow all laws and safety guidelines.