Reflex Facts

It's impossible to kill yourself by holding your breath.

You can't tickle yourself.

It is very difficult to sneeze with your eyes open due to an involuntary reflex. The eye-closing is controlled by the same cranial nerve that triggers sneezing, creating an automatic protective response, though it's not actually to protect eyes from bacteria.

The average person blinks between 5 and 7 million times a year—that's once every few seconds throughout your waking hours!