There she blows

For Christmas Eve I had planned on making a roast, which takes about 4 hours to cook in the crock pot. Easy enough right? You just sear it and put it in the crock pot for 4 hours, non of this slaving over the stove all day, I was going to keep it easy and stress free. Dinner would be at 6 so the roast had to be in the pot by 2pm. Well our day got away from us and we went to see a movie that was longer than expected so the roast was not in the pot by 2pm. In fact it was going to go in around 4pm. So Jeff came up with the idea that we would put it in the pressure cooker for 30 min to speed up the cook time and tenderize the meat. The only problem to this was that his parents pressure cooker had recently stopped working entirely properly (i.e. the weight thing on top that releases pressure had stopped doing it's job and was then lost) so Jeff came up with a way to manually let off the steam and pressure and all was going well. In fact our 30 min was just about up and everything was ready to go in the crock pot. That's when the explosion occurred, there was a very loud boom and then a loud hissing noise followed by rain. I ducked and covered until I was out of the room, only to turn around and see Old Faithful on the stove. There was a rubber release valve that blew and the pressure that was released cause the boom and the veritable rain storm of meat juice that was spraying onto the ceiling and raining down on everyone and everything.
Jeff promptly turned the burner off and the good news was that my roast was ready to go into the crock pot, which I put in promptly. We then began mopping the ceiling and the floor as everything was quite slippery. All in all everything turned out great. Dinner was fine and the kitchen (which was Jeff's mom's kitchen) was sparkling clean and ready for Santa.
The moral of the story. I know we all hear about horror stories of pressure cookers and our was actually quite humorous once we realized everyone still had their faces and there were no holes in the ceiling, but make sure yours has all it's working parts.