[Sci-Fi Thriller] The Perfect Clone 2

I witnessed a chilling scene through the security cameras. Precisely at 3 AM, two lab mice in separate cages suddenly stopped all movement. They stiffly turned, stared intently at each other through the glass, and then, with perfectly synchronized actions and identical frequency, began frantically banging their heads against the cage wires until their skulls shattered. It was then the researchers realized the machine wasn't replicating matter, but forcibly tearing a single soul in half.