i was doing an experiment seeing if a paper towel would burn if it was only in contact with heat, not the flame. I was also seeing if smoke would travel downwards. Some of it did, and the paper towel didn't catch flame, it just blackened. Then the smoke got wet, and since it was all stuck inside the container it smelled really bad when i opened it. Then I had a really bad headache for the rest of the day. Just wanted to explain that.