Hall Media Productions produced and posted a series of vignettes for drug maker Cephalon to promote a medication that helps people struggling with sleepiness.

"Our approach for 'Alertness Matters' was to literally put our audience in the place of sleepy patients."

To do this, Hall Media strapped a stereoscopic camera on the heads of their actors as they woozily played their scenes.  Stereoscopic cinematography uses two cameras to capture a slightly different image creating a sense of depth.  It is the basis for how our vision works.  The 3-page PDF explains how they pulled off the effect in post as well as some of the problems they ran in to.  For example, the calibration of the cameras along the z-axis to create the 3D effect was a delicate process.  If they were slightly off they would get a headache-inducing double vision losing the 3D effect.  You can see the final product on Hall Media's website under Production->Spotlight (I hate how you can't directly link in Flash sites) though the 3D is lost in the web version.