i deliver milk for a living.
you have all probably seen milk crates before. well, each case hold 4 gallons, each gallon is a little over 8.5#'s, and each stack has 6 cases in it. well, yesterday i walked away from a stack of milk and a gust of wind started to knock it over! i had to turn the stack so that it would break the wind at an angle as opposed to straight on in order to keep it standing. that is a strong wind!