Interesting Experiment

Here's an interesting experiment:
"Sit in a Dark Room for about five minutes, then look briefly toward the sun or a bright light. Did you feel a tickle in your nose? Did you sneeze? If so, you belong to the 18 to 35 % of the population who suffers from a medical condition known as ACHOO (autosomal dominant compelling helioophthalmic outburst) syndrome. ACHOO, also commonly called the sunsneeze response – is an inherited disorder in which sensory impulses from the optic nerve spill over into the trigeminal nerve in the nose. A strong visual signal causes itching in the nostrils, which triggers the sneeze reflex."