A buddy broke his 2ND carboy last weekend without injury. He still won't get rid of the rest of his glass. Both that broke were old blue glass water jugs, and the rest of his are new brew carboys, but damn.
EDIT: Same buddy as my previous post.
This one just fractured up the side after filling it with chilled wort. It was the last of 6 batches over the last several days filling his last carboy. I got a frantic call at 11:30pm that his beer was leaking out and he needed to borrow a carboy. I told him he had to come get it. When he got there I offered an autosiphon, and he tried to tell me he was going to lift this full, cracked carboy onto a counter to gravity feed. I told him he was taking the autosiphon, and transferring it where it sat or I was disowning him. I wasn't there to see how he cracked it, but he swears it was room temp, and he didn't bump anything to break it. This guy is like the main character in Final Destination with these carboys.