I honestly almost died a couple of weeks ago transporting a carboy of mine. I was holding the carboy in my arms and slipped at the very top of the stairs, which are steep. Somehow I managed to tobaggon down the stairs on my back, without breaking the carboy!!!! My back hurt pretty badly for a week, other then that it was pretty badass!!!
I've broken carboys before, and they can cut you pretty badly when they do...the thing was literally resting on my belly, it makes me cringe to think of how that could have played out.
I worked at a winemaking store for a while, and they have a pretty easy solution for this....shelves that can hold carboys, four levels high. You start on the top shelf and finish on the bottom shelf...