Sleep paralysis felt like a really slow death while I experience hopelessness, despair and horror. Though at one point I started begging to die asap because the sensation was just that horrible.
Also when my father was trying to force me to go through all the smoke when an apartment on the other side of the floor was on fire so we would get out of the building despite being fairly safe where we were already. The gas was really dense and suffocating, one accidental breath in and my throat went dry along with immediately wanting to breathe air. Was forced to try 3 times before I(or him finally trying to go outside himself) convinced him to stay inside. Having asthma did not help. If he forced me to go through it I would have probably suffocated and died for real, since I barely made like 5 steps outside the door before panic, need for breathe and fear of the dark took over.