Dying via drowning is a bad way to go
All air slowly escaping your lungs nothing you can do
Your vision slowing going black as the air fades away from you
One time I had a dream of walking at night unsuspectingly and having a gun muzzle pressed on the back of my head and being shot before I could react but with enough time to realise Im fucked. I dream of dying very often but that was more terrifying than any other I had, despite being a quick way to die I never forget it