Don't ever sneeze while wearing a diving helmet or a space helmet, because if you do it will drive your head down halfway into your chest and probably bust both your eardrums too.

Don't sneeze while lying on your back, cos you'll get whiplash.

Don't sneeze while lying on your side, cos you'll fly right off the bed.

Don't sneeze while walking the tightrope in the high wire act!

Most of all, don't sneeze while shaving with a straight razor!!!!!!

GEEZ!!!! And I just sneezed twice while typing out the above warnings.