Was out this morning in my ladder stand and it was a lot cooler than it has been. Nobody told the skeeters to take the day off so I cranked up the Thermacell. I have a Big Game Ultra-View and the floor kind of butterflys around the tree. Anyway I placed the Thermacell on the floor to my left and went about scanning the trails for deer. After a while I smelled smoke and looking down I saw a leaf had fallen on the unit and was about 30 seconds away from blazing up. Put out the leaf without incident but just a reminder to watch the deer and glance at any other equipment you may be utilizing. Safe hunting!