```
The moment he heard the sound, Sun Jack dragged the two people beside him and threw himself to the ground, and the next instant, several lasers swiftly swept over their heads at high speed.
Sun Jack felt a surge of relief in his heart; the sound was indeed on his side - this was not a trap.
But this was just the beginning. The ceiling lights began to flash red incessantly, and the sound of footsteps started coming from all directions.
"They're behind the brain wall! Don't hurt those brains!" The voice rang in Sun Jack's mind once again.
Sun Jack blew up the corridor and rushed straight into the room where there had been people's brains and heads. "Where the hell are you? I'll take you out of here!"
But when he and the two others burst behind the wall of heads, Sun Jack came to an abrupt stop - he saw four people of varied heights, weights, and builds, their limbs and eyes modified with metal, huddled around a stack of screens and equipment, seemingly busy with some task.
