Sometimes an idea is just so brilliant that it can only be described as Einsteinian. Take, for example, turning a HTC One into a tiny ultrasound scanner - if this isn't the third pillar of modern physics, we don't know what is.
The creative bods over at Oliver's Island have combined a firmware hack with an app so that the phone emits ultrasound pulses from its BoomSound speakers, which then bounce back into the mic.
Annoyingly we can't verify if it's totally legit as you can't go out and buy it - the publishers say the ultrasound hack "is not something most people would be able to carry out safely."
Shame. We'd be willing to shell out quite a lot for this... *mic tap* WE SAID...