The "crack" wasn't just for the software. It was a crack in the glass of his reality.
On the screen, the digital Leo began to move in agonizingly slow increments. In the real world, Leo felt his heart rate plummet. His breath hitched, hanging in the air like a frozen mist. He tried to scream, but the sound was a low-frequency rumble that took an eternity to leave his throat.
Would you like to explore a different genre for this story, perhaps a tech-thriller or a comedy about a software mishap, or should we develop a sequel where Leo discovers what is inside the file?