Apparently, this is a well-known thing in the military, but no one told me until we learned about it in the film Beneath Hill 60.

It's also a potential reason why pirates are known to wear eye patches—from popping up and down between decks—though it's rather hard to be sure. But I think the primary use case is going for a pee in the night.

Shut one eye to keep your night vision

Learned from Joe Smith’s short entertaining TED talk: How to use a paper towel.

Dry your hands with only one towel

If you are feeling the need to sneeze some people will find that looking at a bright light can help release it.

Apparently, it’s called the photic sneeze. I asked the question of Focus magazine in the UK, and it seemed to me that Science doesn’t really know why. We need to find out.

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Bright light will free your sneeze