Source of panic

It can be said that the current situation is very unfavorable to me.
He couldn't even judge the opponent's position accurately. Although he could judge the bullet's trajectory from the direction where the bullet hit the wall, he couldn't judge the exact distance. Moreover, before this, he had not carefully observed the situation outside and didn't know the layout outside, so this was very passive for him.
During this time, he heard Ye Xiaotong's nervous voice behind the shelters. He must...