Cellphone

Was watching Eagle Eye, a movie where a supercomputer hacks into the protagonists' phones and commands them to do stuff in a calm, neutral female voice, like, say, escape from the FBI and lead them on a citywide car chase.

And remotely controlling traffic lights, gates, and construction cranes which practically destroy everything else.

And the cellphone rings, and the calm voice talks with cold calculation.

"You have been activated. The FBI will enter your room in thirty seconds. Escape."
"Accelerate to 60mph."

Protagonist: "Turn right! Turn right! Turn right!"
Cold voice: "Do not turn right." (pedal on car visibly moves, steering wheel locks)
Protagonist: *OH F-*

And suddenly, my home phone rang.
My parents and I stared at each other.

I picked up the phone, tossed it to my mother, and went to do my work instead.