"Initial shock" refers to the immediate and overwhelming feeling of surprise, fear, or disbelief that someone experiences when faced with something unexpected or disturbing. Full definition
People's initial shock of finding out that I love travelling alone is often replaced with either a look of awe, confusion or pity. (beachbumadventure.com)
And are we shocked in a way that goes beyond initial shock? (skowheganart.org)
Miranda Richardson and the reliable veteran Clancy Brown play Jeff's divorced parents, each actor displaying the appropriate initial shock and concern when they first learn of their son's condition. (kaplanvskaplan.com)