If you're very clever, like these Swedish witches physicists, you can take those virtual particles and turn them into real particles, effectively creating something out of nothing. If you can get a mirror [vibrating] incredibly fast...some of the virtual photons that pop into existence on its surface won't have time to disappear again before the mirror runs into them. The energy of these virtual photons then gets absorbed by the mirror, which then spits the energy back out, but as re