[ CW ] In five sentences , tell a horror story .

White lilacs staggered themselves across the verdant fields, the azure sky crawling slowly with clouds following suit. 
 The young boy lay sprawled on the ground, dozing off with his sister next him, her body rising and lowering with each soft heartbeat that she gave. 
 A gunshot ruptured his eardrums, and before his hands could rub the blood away from his ears he noticed the lifeless corpse of the girl. 
 His scream echoed through the test chamber, tubes and wires rattled as he attempted to rip the straps holding him down. 
 The grey figures took notes, and adjusted dials before running the test again, however, this time when the monitor flickered to life, an image of him pulling the trigger appeared; eyes never looked so full of pain.
