Peace all,
It happend to me once some 8 years ago as I never blieve in such conjecture of spirites and jinn things, so I went to the Dr who explained me what actually happend. I try to explain whatever I remember.
All parts of our body, including the muscles and the brain, depend on the breathing muscles and the circulation working together to deliver the oxygen needed by all body cells and to remove the carbon dioxide produced by all body cells.The part of our body that is the most sensitive to lack of oxygen is our brain. If the brain is deprived of oxygen for a few minutes, parts of the brain can be permanently damaged. If oxygen deprivation continues, the person can become "brain dead". So the part of our brian which control our breathing do not let us hold our breath for too long.
Our breathing consists of a regular rhythm of alternately inhaling air into the lungs and exhaling air out from the lungs. Like all our body diaphragm as receive signals from the brain to contract to inhale air into the lungs and relaxes so air is pushed out of the lungs. Thus, breathing depends on rhythmic contraction and relaxation of the diaphragm. When this rhythm disturbed and diaphragm relax for longer time than its usuall brian dont get proper oxygen as a result brian stop sending signals to the body and burden you feel is the automatic system fo brian to restore the regular rhuthm of breathing. It happens even less than half a second.
ThNabi is right its all related to breath!
Peace all, Hamsa