Always have some Arizona Ice Tea in the fridge (my most important rule in life).
Other than that, life is kind of like diffusion. On average, a person gets nowhere, since they have an equal probability of moving in any direction, thus canceling out and ending up where they started. But when looked at specifically, one being does move places, thus making the entire calculation somewhat counter-intuitive and quite difficult to grasp. When all else is equal, people tend to spread out to achieve equal density in a given volume. But there are other factors such as polarity and electromagnetic forces that determines the concentration, throwing another factor into the calculation. But alas, humans are not completely soluble, so we end up with a lot of substance at the lowest altitudes, becoming less and less concentrated as the altitude increases. In order to increase solubility, the heat has to be increased or the solution has to be stirred.
Humans have low bonding energy, so any vigorous stirring or excessive heating of the solution will cause them to break down into free radicals, possibly making the solution somewhat toxic. Most of them are also polar so they may form molecules containing a few individuals through strong hydrogen bonds (the polar ones also dissolve easier). These molecules tend to reassemble themselves when forcefully separated. The non-polar ones are fewer in number, stand out quite a bit, and are generally in atomic instead of molecular form. Finally, despite the low bonding energy, humans have a lot of potential energy. So if heated to high enough temperature (or stirred vigorously enough) the solution has a tendency to combust violently. The amount of energy required to cause the solution to combust is high enough to cause a lot of humans to break down into free radicals, thus the combustion will spread toxic substances to large distances. If such a combustion occurs, evacuate the lab immediately!
Just my theory

Apologies for the long, rant-ish post.