The Jubilee Line's planners failed to foresee the problems caused by the introduction of a novel tunnelling technique and a high-tech signalling system.
The folks at tech blog The Verge tried out the technique, and said they were also able to access photos on the phone by attempting to add a photo to a contact.
Despite the tech's home furnishing friendly approach, this breakthrough printing technique can't be done with your everyday inkjet, but it will make the cost of solar energy installations a bit cozier.