All the time, whether I am picturing the bus that I am in coming off the road, some impending illness that hasn't quite reached the surface yet, getting caught up in a bombing, having a heart attack or a stroke, these things go through my head several times a day, they always have done.

That is part of the reason why I started looking up and researching the mysteries of space, it makes you realise how insignificant you are and that if something was to happen it wouldn't really matter.

The other day I was chewing on a piece of plastic and actually thought 'I wonder how long it'd take me to choke to death if I accidentally swallowed this...I wonder how long it'd take anyone to find me' thoughts like that don't bother me anymore.