This took place about 18 years ago. I tried making spaghetti sauce in a crockpot for the first time. So I add the couple of cans of pre-made sauce, a pound of hamburger meat, a handfull of chopped onion turned it on low and left for work thinking this is going to be great. When I got home, there was a kinda sweet smell, not an "mmmmm" smell, but a "hmmmm" smell. Yeah. The smell of raw hambuger sweetened by canned spagetti sauce simmering for 8 hours. You should've seen it. About 2 inches of grease floating on top. I had pizza that night.