Surprise:
* "My heart leapt into my throat as the door creaked open." (Implies a sudden, unexpected event causing alarm)
* "His eyes widened in disbelief, his jaw slack with astonishment." (Describes physical reactions of surprise)
* "A chill ran down her spine as she realized the truth." (Metaphorical description of sudden realization causing unease)
* "The silence was deafening, broken only by the sound of her own rapid pulse." (Emphasis on the unsettling stillness and heightened awareness)
Fear:
* "His breath caught in his throat, each inhale a struggle against the rising panic." (Focuses on physical response to fear)
* "She felt a cold dread settle in her stomach, a premonition of something terrible." (Emphasizes the feeling of apprehension and foreboding)
* "The hairs on the back of his neck stood on end, his senses heightened to the point of overload." (Describes a primal, instinctive reaction to danger)
* "His mind raced, frantically searching for an escape, a way out of this nightmare." (Emphasizes the overwhelming sense of urgency and desperation)
Combined Surprise and Fear:
* "His blood ran cold as he saw the figure emerge from the shadows, a primal instinct urging him to flee." (Combines the shock of a sudden appearance with a visceral reaction of fear)
* "She froze, her heart pounding in her chest as a low growl echoed through the darkness." (Conveys a sense of stillness and anxiety in response to an unknown threat)
* "A gasp escaped her lips as the room suddenly plunged into darkness, the silence heavy with unseen danger." (Combines the element of surprise with the chilling realization of potential peril)
Remember, the best way to convey surprise and fear is through vivid descriptions and actions that evoke the feeling rather than simply stating the emotion.