I don't want to necro the carboy thread, but in college I had a 3 gallon glass carboy full of cold water. I picked it up to put it in sink, and momentum kind of carried it into the corner of the refrigerator. Doesn't take much speed for the momentum of 25 lbs of water to just roll through the glass...
I miraculously avoided injury during the following explosion of glass-laden water. Not a scratch.
During cleanup, I thought the ragged bottom/partial side of carboy looked cool, so I took it to the sink to rinse off. It disintegrated in my hands and sliced my finger pretty good. Lesson learned.