Yes, but it was more like 'loop and burn out a transistor'. No fire and no visible damage, just a cpu that wouldn't work any more. I didn't try it again to see if it was reproducible, it was a lot of money for me at the time and I considered myself pretty dumb for trying. A sample of '1' was enough to prove the point for me. I wished I recalled what drove me to try it, I'm fairly sure it was some outside influence, not something I came up with by myself and wondering 'what if'. More like: that's never going to work, here, let me show you. (Famous last words...)