Those centipedes are hard to kill too! I found a red-pincher'd or red headed one, it was gross! stomped it a few times, that got it mad, but also slowed it down. I got a toilet bowl brush, and managed to transport the sucker to the toilet where I proceded to use an old mouthwash bottle to smash it to bits.
Well, that didn't work, the stupid thing was still wriggling and trying to get out. I bashed it up pretty good too, but it was all in one piece still! So I take the top part of the bottle and just rolled up from his middle to his head, until finally its head popped, audibly!
I really and truely do hate those suckers! If I ever get overrun by spiders, I *might* consider letting them live, but I doubt it. Those are some of the only creatures that creep me out.