You should remove a heavy object that is crushing someone as long as it's safe to do so and physically possible or possible with machinery etc.
You just have to be careful that the heavy object does not come crashing down again on the person and crush them further.
However if the object is not removed then they can die if the heavy object is not removed quick enough.
You should remove a crushing force right away if safe and if possible to do so.
However if you cannot remove the crushing force wait for medical help and other help to remove the crushing force.
A casualty with a crush injury may not complain of pain, and there may be no external signs of injury.
Keep the casualty warm, treat any bleeding.
A tourniquet can be used for a crush injury if the crush injury has caused bleeding.
If someone is suffering from a crush injury and they are also bleeding bad then a tourniquet can and should be used for the bleeding.
Crush Injuries take from a few days to a few weeks or even as long as a month to heal depending on how bad the crush injury was.
A double crush nerve injury which is also known as double crush syndrome is the distinct compression at two or more locations along the course of a peripheral nerve that can coexist and synergistically increase symptom intensity.
You can crush a vein and when you crush a vein you may experience bleeding as well as feel pain or pressure, and see or feel a lump or bruise.
When your arm is crushed it will usually be very painful, you may have bleeding externally or internally and also get compartment syndrome.
Having your arm crushed can also lead to other issues such as infection, swelling, blood clots, phantom pain, the need for further amputation, and heart problems.
When you get crushed you may feel some pain or may not feel any pain at all if the crushing of your body kills you instantly or near instantly.
Some people who get crushed such as a building or something heavy falling on them usually die as a result and may only feel some pain for a few seconds or may not feel pain and die instantly.
Other times if you get crushed by an animal or even humans you will usually be in severe pain unless it kills you and the crushing of your body can cause internal bleeding as well.
Crush injuries frequently lead to severe disability, and have a high chance of additional complications, including infection, swelling, blood clots, phantom pain, the need for further amputation, and heart problems.
A stampede and a crowd crush is the type of disaster that can occur in an extremely crowded place.
To survive a panic crowd try getting out of the way if possible before everyone starts to panic and move.
Also try being in the very rear of the crowd or the very front of the crowd.
Other ways to survive a panic crowd include.
Stay on your feet.
Conserve your energy – don't push against the crowd and don't yell or scream.
Use sign language to communicate with those around you (point, wave, even use your eyes)
Keep your hands up by your chest, like a boxer – it allows you movement and protects your chest.
What happens when you get trampled is the area around you will feel superheated with all the panicked people around you, and you may not be able to breathe.
You won't be able to move, and you won't be able to call for help.
But you will be able to hear others screaming, calling for help, or groaning in pain.
More than 50% of victims of kicking and trampling deaths have fractures of the calvaria, skull base, or facial bones.
In such cases, subdural and subarachnoidal bleeding, brain contusion, and intra-cerebral hemorrhage is a frequent cause of death.
Human stampedes are caused by overcrowding and crowd panic when a bunch of people try to move in one direction or other directions all at once.
Deadly human stampedes are not always caused by crowd panic, though — they can also be caused by entrapment in a limited area and physical strain.
As well as at religious pilgrimages, stampedes have caused deaths at sporting matches, music events and during emergency situations, such as fires and explosions.
A crush stampede is when a crowd of people moves in the same direction at the same time, some may collide and pile up against or on top of each other.
This can get very dangerous very quickly.
Experts refer to such an incident as a stampede, crowd surge, or crowd crush.
If you get caught in a stampede you should do the following.
Stay on your feet.
Conserve energy – don't push against the crowd and don't yell or scream.
Use sign language to communicate with those around you (point, wave, even use your eyes)
Keep your hands up by your chest, like a boxer – it allows you movement and protects your chest.
While you might think most injuries and deaths in such incidents are cause by trampling, a lack of oxygen is often to blame.
The crush of the crowd pushes against your chest and makes it hard to breathe, leading to what's called compressive asphyxia.
It can also cause head and neck injuries.
Crushes often occur during religious pilgrimages and large entertainment events, as they tend to involve dense crowds, with people closely surrounded on all sides.
Human stampedes and crushes also occur as people try to get away from a perceived danger, as in a case where a noxious gas was released in crowded premises.
On 24 September 2015, an event described as a "crush and stampede" caused deaths estimated at well over 2,000 people, suffocated or crushed during the annual Hajj pilgrimage in Mina, Mecca, Saudi Arabia, making it the deadliest Hajj disaster in history.