Pair that w/ drug & alcohol abuse....well, I don't need to say much more.On top of that, you're dealing w/ code/permits, city policies, material delays/shortages, labor shortages, change orders, the weather, ect.   

Near areas where there are big race months or other well know events that happen every year that people come and go crazy with alcohol. 

This is talked about in the book: "The Richest Man in Babylon" The clay tablets with the information of how to make, save, invest and keep wealth are worth a lot more than the purse full of gold.