In case you can't tell, this is a light bulb in a microwave oven. As most of you know, you're not supposed to put metal in microwaves. Why? ...because of the risk of fire. You see, the microwaves excite the electrons in the metal, the metal gets hot, and any combustible around it will, well, combust. And, surprise, that's what happens when you put a lightbulb in a microwave oven. The filament gets hot, the gases catch fire, and the bulb glows. On the lowest power setting, the bulb glowed after about 1 second and exploded after about 4 seconds...very difficult conditions for photography. WARNING: don't try this at home. It's bad for the bulb, bad for the microwave, and bad for you.