Science - re lighting a candle using it's wax vapor

This is a fun video.  When you blow out a candle, there is a little bit of smoke that is released.  This is what you see coming off the wick after it's been blown out.  Since there is a little bit of wax remaining in this "smoke", they call it a wax vapor.  By using fire, you can re light the candle from this wax vapor.  It travels down the vapor and re lights the candle.  Pretty cool and it works...I tried this with my mom.