Has there ever existed a technology we couldn't absolutely control? We've made things that are incredibly dangerous, but we also know under what conditions those inventions become dangerous, and can prevent those conditions from occurring.

We are at the beginning of this chapter in technological progress, and it seems a reasonable assertion - though a frightening one - to say that this thing we've made already escapes us when it chooses to.

I'm not an expert though, so please tell me what I'm overlooking.