Okay, I feel like a sucker, but I just saw this infomercial-style 30-second commercial for a product called Cold Heat. It's a cordless soldering iron that instantaneously turns hot and then cold again. Sounds like science fiction, especially since they're selling the thing for $20, but unless they used gallium-based fake solder for the demonstration, I'm kinda convinced.

Anyone else heard of it? I'm almost inclined to throw away $20 just to see one.