Because the ebola virus just isn't giving you the paranoia fix that you need on a late Tuesday afternoon:

In other experiments, they extracted useful audio signals from videos of aluminum foil, the surface of a glass of water, and even the leaves of a potted plant. The researchers will present their findings in a paper at this year's Siggraph, the premier computer graphics conference.

Thank God, no one at Georgia Tech is doing anything like this. Right, guys?