I had a bad reaction (anaphylaxis) to a drug given in hospital a while back.
I was having a test to determine my hormone levels. To do this, the nurse was to inject a drug which would stimulate the pituitary gland which in turn would stimulate hormone production.
Just before I was due the injection, I stopped the nurse and asked if there were any side-effects. She told me that there were but they were rare (1 in 20K). As soon as the needle went in, I started feeling very light-headed. Apparently all I said was, "I feel dread-" then collapsed.
My poor Mother was there (she had driven me in) watching it all unfold. Within the space of 30 seconds, there were a dozen people round me. I was being fitted with monitors, IV lines and injected with adrenaline to boost my HR.
I was, of course, oblivious to all of this. After what I said, I felt extremely calm. I knew something was awfully wrong and I knew I was going to die, but I felt very calm and at ease. I thought about my family, wife, kids Mum etc.. but did not feel any anger or upset or regret.
I did not "see" anyone or anything. No beckoning dead relatives (thank goodness, one would have been my ex-wife! Only kidding) or tunnels of light and certainly not a geezer next to a pair of gates.
The next thing I knew, I was coming round in a bay next to my Mum.
The nurses told me my BP plummeted to 45/25. She explained this rapid loss of BP causes what is known as a "feeling of impending doom" where you realise you are about to die, after which the monitor packed in measuring, then my heart briefly stopped. This all happened in a matter of seconds.
Scary.
But I appreciate all the more being here now & with things that I got angry and irate about before, I am now like, "So what?"
It really does give you a new perspective on life.