Claustrophobic.
A morbid fear of being confined in a closed space.
Your breath gets stuck in the throat and the crazy spinning of your head doesn't stop. You feel that the walls are closing upon you and there is no air to breathe no matter how much you try to breathe in. The puffing of your chest increases as an invisible hand chokes your neck. The heavyweight all over your body crumbles you down. The pain in your head which was initially like a small needle pierces your head into two splits. The gruesome nauseous feeling in your stomach buries itself there, six inches deep. The endless screams which come out of the lips don't stop but keep on ringing in your ears, and you wonder why no one can hear you. The black spots in your vision make you blind, and the only thing you feel is pain and panic.
You are not dead.
You wish you were.