The finger gesture that people use to dismiss the notifications can be distracting, as can the flash of light on the Glass itself.

CNN: Figuring out real-world etiquette for Google Glass

Of course, it could also indicate that this is really early software with the wrong (read: iPad) wording -- but at any rate, we could definitely see the benefit of, say, a two-finger gesture to swipe between apps.

ENGADGET: iPhone rumor two-pack: multitasking gestures and MobileMe Photo Streams? (Update: those pics are real)

As with The Loop (and most of the remainder of the Kin's UI, for that matter), contacts are presented as a comic book-style grid that can be managed with a two-finger tap gesture.

ENGADGET: Microsoft Kin: everything you ever wanted to know

He looks transported with excitement, and lifts his pale, slender index finger in a gesture of friendly beckoning.

WSJ: Jan van Eyck | 'The Annunciation' | Old Subject, New Approach | Masterpiece | By Richard Cork

He responded by drawing his finger across his throat in a gesture that seemed dismissive and contemptuous rather than threatening before more mundanely asking the judge for bathroom break.

BBC: Ratko Mladic led ethnic cleansing, war crimes trial told

Before the trial that started Wednesday, he also drew a finger across his throat in court, a gesture aimed at some of the Srebrenica widows.

CNN: Mladic shows no remorse as war crimes trial opens

He admitted throwing a drink over the young riding instructor and wagging his finger at her, but said he never made any kind of shooting gesture towards her as described by two witnesses.

BBC: NEWS | UK | England | Derbyshire | Ex-fiance denies murder threats

The answer was implicit in the question, and with a resigned gesture Rousselot showed her the gold ring that was constricting his ring finger at that moment as never before.

NEWYORKER: ?lvaro Rousselot��s Journey

When you perform certain gestures with your hand--such as touching your thumb to your index finger in the "okay" sign--there are electrical signals associated with that gesture that pass through the nerves in your upper arm as they carry commands from your brain to your hand.

FORBES: Digital Tools