Do you really close your eyes when sneezing to keep your eyeball from flying out?

No!

No, you close your eyes to keep the tiny droplets of spit (which contain huge amounts of bacteria) from getting into your eyes.

It's true. It happened to a friend yrs back and had 10 operations before eyes were fixed.  But they switched eye balls cause now he's cross-eyed.

Of course, it's true. I tried once to hold my eyes open. It just will NOT work,.

yes the reason our eyes are closed so our eyes won't pop out also your heart stops beating when you sneeze.

It is a physical reaction. The human body is just wired that way.