I've done it a hundred times with no problem, poured hot wort into a glass carboy. I just spent the last two hours brewing an Imperial Pale Ale on the old wood stove in the man cave, was going to pour it into the carboy and let it cool over night while the yeast starter did it's magic, half way through the pour it sounded like a .22 going off. The whole bottom of the carboy blew off and dumped about 2 1/2 to 3 gallons of wort onto the floor. I just killed my favorite carboy and I don't know what I am going to do with the left over wort. I was so pissed I just tossed a cover on it and used the shop vac to try and clean up the mess. Maybe after I settle down I'll figure out what to do with it. I know it won't be an Imperial but I could just add water until I get a fair SG. At least my yeast won't go to waste that way. Man am I pissed at myself!