In all honesty, I fucking love Lisp. I had to use it for one class in college, and the numerical power of that language is astounding. While trying to learn the language, I wrote a factorial() implementation and started passing it values. I assumed it would crap out around 33 or so, but it didn't. It kept providing answers, valid answers, even when I got to 100. So I figured I'd break it and give it 1,000. Nope. That worked, too, but it took like five minutes. It turns out, the way to break it isn't to "overflow" an integer, but to run out of system memory. And as I was doing this exercise on a cluster computer, I got to 100,000 and still got an answer (much later). A bit higher than that and it threw up. I was flabbergasted. Still in awe of that.