Siri on Apple's iPhone 4S has all the answers. Even Santa relies on Siri apparently. Over the Christmas period a whole new spate of iPhone 4S users are bound to be playing with the voice-activated app.
But what would happen if Siri went bad? In a spoof trailer based on the teen horror flick genre, Siri gets scary for these luckless teens in "Siri: The Holiday Horror Movie."
The first hollow clue is when Siri tells the teens: "Life. has. no. meaning."
The action soon hots up, as a mad mobile turns the film into a Final Destination death-fest. Siri advises drivers to crash into buildings, ties up fresh-faced young girls, and a "knife" app stabs one of the youngsters to death. As the voiceover says:
"The present you think you're tearing into, is actually tearing into you."
The fake trailer was produced by Texan production group "Rooster Teeth" and has had more than a million hits so far. It might sound stupid but watch it - it's surprisingly scary.