The 'Five-Second-Rule' Isn't Real
Food doesn't magically protect itself from bacteria within the five-second period after you've dropped it on the ground. However, science shows that it's actually not that bad to eat food off of the ground, depending on the ground you drop it on. Also, moist food tends to gather more bacteria than dry food, keep that in mind.
Coffee Doesn't Stunt Your Growth
Most research that's been conducted in the field shows that caffeine consumption does not halt bone growth in children. In adults, caffeine has been shown to very (very) slightly reduce calcium absorption, but adding as little as a tablespoon of milk alternative to your coffee will offset that effect. False advertising is the reason people suspect that this is a real thing, but it's been proven time and time again that drinking coffee has virtually no negative side effects.