"Quickly and in my sleep," is the usual consensus.
Augustine of Hippo redirects us from this distraction to what really
matters in this event we call death.
"That death is not to be judged as evil which is the end of a good
life; for death becomes evil only in the retribution which follows it.
They, then, who are destined to die, need not be careful to inquire
what death they are to die, but into what place death will usher
them." (City of God, Chapter 11)
It is not the door we walk through, but the place we arrive at through
the door, that should concern us. "For to me to live is Christ, to die
is gain." (Philippians 1:21)