6 If you are trapped in a fire in a building, stoop low: the breathable air will be near the floor.

7 While performing CPR on someone, push on their chest to the beat of Stayin’ Alive.

This is the perfect song to give CPR to, says the American Heart Association: its tempo, at 103 beats per minute, is almost a perfect match to the recommended rate of 100 compressions a minute for hands-only CPR, which, says the American Heart Association, is the simpler and more comfortable counterpart of the mouth-to-mouth resuscitation.(source)

8 If a man pees on a pregnancy test strip and the result shows positive, it might be a sign of testicular cancer.

If you’re a man, and the recent pregnancy test that you took (just for fun, of course) shows that you’re about to be a mother, you need to get yourself into the oncologist’s clinic really fast! The pee-on-a-stick home pregnancy tests can be useful to detect testicular cancer: this is because several testicular cancers produce an elevation in the levels of beta human chorionic gonadotropin – the same hormone produced during pregnancy.(source)

9 High atmospheric pressure affects the bubbles in your coffee: if the bubbles happen to be concentrated in the center, expect rain or stormy weather. 

If you thought that your cup of coffee is only good for keeping you awake, you are wrong – it can also help predict the weather: if the bubbles in your coffee tend to stay near the edges of the cup, expect the weather to be pleasant; if the bubbles show a preference for the center, it is very likely that it would rain. The reason for this is that high atmospheric pressure that pushes the bubbles to the edge of the cup is an indicator of good weather.(source)

10 Provided that the husk is intact, coconut water is isotonic, as well as sterile. It is because of this that it is sometimes injected directly into the bloodstream as a substitute for an IV bad in underdeveloped countries.

Coconuts have been used as healthy substitutes for an IV bag to rehydrate people in some countries, and although they are not the ideal option, they are, nevertheless, highly effective. As long as they remain sterile, they have pretty much the same specific gravity as blood plasma. However, if used for a longer period, the high levels of potassium may bring about cardiac or renal problems.(source)