That reminds me of something generally known as "Murphy's Law", which states "That which can go wrong, will", apparently there are a lot of corollarys, which are related to Murphy's Law, there's one that states "A dropped object will gravitate to where it can do the most damage", there's another one that states "If N number of stocked items are needed, there will be N-1 items actually in stock", from what I have read online, there have been some university studies of Murphy's Law.