I have an innate fear of snakes. (Ran into them all of the time when I was younger-it was habit for me to scan the ground for them when I hiked or climbed.)
Conceptually, I fear the idea of being severly disabled (ie can't do useful things) but force "to live." One of the things that makes living worthwhile for me is being able to do useful things independently like cook, clean, earn money, drive, shop, exercise, and check in on people's well being. Plus, I hate being stuck inside--it is essential for my happiness to get fresh air and sunshine--and I want to be able to stroll outside when I feel like it, not on some sort of institution's (this makes me think of IP) schedule or something similiar.