Good grief, that is a stupid thing to say, with the benefit of hindsight
r88... Why is it a stupid thing to say? I suppose it was the wicked fairies that caused the helicopter to crash rather than a wire strike?
Always assume there is a wire. Even if you can't see it! Even if you've looked for it. Even if you've looked for it twice. Look again. And maybe then you will still miss it and be unlucky.