In 2004 or so when I was a college student living in a studio apartment, I was working on a project over the winter break and wanted to heat treat some small titanium parts. The college's metal shop was closed for the break, so I decided to do it with a torch in my kitchen. The ventilation was not adequate and I gave myself metal fume flu, making myself really sick for two days. 1/10 got real sick, would not recommend (but the finish on my parts turned out sick (the other kind of sick))