SNAPTACULAR

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Espernaut
@Espernaut
20 Years1,000+ Posts

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Passing from a dimly lit room into bright sunlight causes some of us to Sneeze.

"Photic sneeze reflex" occurs in something like one-sixth to one-quarter of the population. A Johns Hopkins study indicates the trait is passed along genetically, with a 50 percent chance of inheritance.

It's caused by tears (our eyes water to protect the unadjusted irises from bright lights) moving into the nasal passages, tickling the hairs within. The result: kerchoo! --Peter R., Decatur, Georgia (credit where due..)