Cade activates the camera. Showing Ratche being melted for metal.

Cade: "They're melting Ratchet.."

Optimus Prime is actually about to break the "Don't kill humans" rule, he destroys a streetlight.

Optimus: "THEY SLAUGHTERED RATCHET! IM GONNA TEAR THEM APART!"

Minutes later. Optimus, Bumblebee, Drift, Hound, and Crosshair break into KSI headquarters.