His spectacles would not stay up on his nose, so he was in the habit of tilting his head higher to see.

NPR: Excerpt: 'Skybreaker'

Ravens nose tackle Terrence Cody could be seen on the stadium's video board tilting his head back, appearing to hold back tears.

NPR: Sandy Hook Choir, Hudson Delight Super Bowl Crowd

Viewing angles were actually pretty impressive -- at least in comparison to the other glasses-free 3D displays we've seen -- and tilting our head slightly didn't throw off the 3D effect too much.

ENGADGET: Stream TV Elocity 3T glasses-free TV eyes-on Hands-on

Except for feeling wiped out, I was back to sounding authoritative and in control, even tilting my head and smirking sheepishly as if to say, You'll forgive me for that little freak-out I just had.

CNN: Robin Meade talks anxiety and her road to self-confidence

Heavy make-up or a mask will also work, as will tilting your head at a 15-degree angle, which fools the software into thinking you do not have a face, according to an online guide produced by hacktivist group Anonymous.

BBC: 'Privacy visor blocks facial recognition software'

Head tilting is another signal that you are interested, curious and involved.

FORBES: Want to Build Collaboration? Watch Your Body Language!