It is when the trachea collapses
When a volcano collapses on itself a caldera is then formed.
I think you die. The trachea is like a tube connecting the mouth/oral airway to the lungs. The trachea will stop working if it becomes blocked eg by a foreign body - oh no I shouldn't inhale marbles!, or if it collapses in on itself. If the trachea is blocked there is no gas exchange with blood in the lungs. ie hypoxia (low oxygen and hypercapnoea ( high carbon dioxide levels) result which rapidly lead to cardiac dysfunction and death.
What happens when a bolus gets stuck in the trachea is that it makes breathing difficult. If the food is not removed from the trachea, the person could die.
sinkhole
No, the trachea does not collapse between respirations. The trachea is a rigid tube made of cartilage rings that help to maintain its shape and prevent collapse. It remains open to allow air to pass in and out of the lungs during breathing.
The collapses star gets squeezed by collapses gas and turns into a black hole.
Because if it collapses you will not be able to breathe....and will die.
it will all dissappear
It collapses.
Yes, if the star is massive enough when the core collapses a supernova explosion happens.
we cannot breath