deer in the headlights

A mental state of high arousal caused by anxiety, fear, panic, surprise and/or confusion, or substance abuse. A person experiencing the "deer in headlights" syndrome often shows behavioral signs reminding those of a deer subjected to a car's headlights, such as widely opened eyes and a transcient lack of motor reactions.

چشمها از حدقه بیرون زدن ( از تعجب یا ترس زیاد )

When I saw the boddy, I was like a deer in the headlight
وقتی من جسد رو دیدم، چشام از حدقه زد بیرون!