'After 11 seasons on Grey's Anatomy, Patrick Dempsey is moving on to pursue other interests. Dr. Derek Shepherd is an iconic character and we've been proud to be the home of McDreamy and the Mer/Der love story,' it said.
Fear is an unpleasant and often strong emotion caused by anticipation or awareness of danger.[1] Fear is completely natural and helps people to recognize and respond to dangerous situations and threats.
What cause's the fear  Your autonomic nervous system responding to the situation with a fight or flight reaction and all-or-nothing, adrenaline secretion. That is what cause's the FEAR FEELING. Why do Snakes cause you to have this reaction ? could be down to one or a combination of many psychological issues. The fight or flight reaction is inherent in us all, this is a survival mechanism ie when faced with danger or perceive we are faced with danger do we run from it or fight.