Some really gross things being told here, very nice 
I also cannot stand microwave popcorn in any way shape or form 
From my days working as a cook, burning a big stock pot while cooking tapioca in a double boiler cause the bottom one ran dry made quite a smell. Liver didn't smell too good to me while I was cooking it :blah:
At work in the last couple of years, someone pushed 20 minutes on the microwave while cooking some sausage samples, instead of 2 minutes. It was at about the 8 minute mark when people began to take notice that there was something in their, and there was a terrible smell as well. Luckily, I spend most of my time outside of the office, so I didn't fare too badly :)