A group of people watching a movie tend to blink in unison. Every minute, you lose six seconds of visual information. But lucky for you, you subconsciously control the timing of your blinks to ensure that you don’t miss anything important. Thus it stands to reason that people watching the same movie at the same time would blink at the same time to miss the same unimportant stuff. And they do.
Jean-Dominique Bauby suffered a massive stroke. When he woke up twenty days later, he found he was entirely speechless; he could only blink his left eyelid. Despite his condition, he wrote the book The Diving Bell and the Butterfly by blinking when the correct letter was reached by a person slowly reciting the alphabet over and over again. Bauby composed and edited the book entirely in his head, and dictated it one letter at a time. The book, about 140 pages long, took Bauby an estimated 200,000 blinks to complete. It was published in France on 6 March 1997. Bauby died suddenly from pneumonia three days after the French publication of his book.
Blinking gives your brain a break.