"747 wingspan slicing through the cables."

Intuition tells me that it might be like an ostrich egg hitting a 1/2 inch line. That cable and the tension it's under might be so massive compared to even a 747 the damage might be minimal. And the fire wouldn't be contained, so it might be negligible, too.

And, for all I know, it might sever it.

Could be hard to hit, too. At least with something other than a wing. My guess is that for the inexperienced pilot, especially with no references such as are found at airports, maneuvering something like a 747 to an exact altitude is tough.

Scary thoughts.

Arf