Sometimes I'm not as smart as people think I am. Either that or I completely lack common sense. Case in point: it is almost always cold as an ice box in this lab. I turned on my little under-the-lab-bench space heater. Well, the night time guy keeps it turned toward the edge of the desk. Whatever. I wanted it aimed at my feet. So what did I do? I moved it with the tip of my big toe to change the aim. Ya, my big toe without my shoe. Did you know the surface of those things can get pretty hot? Well, ya. This is your fair warning. Do not touch the surface of a heater without proper insulation.