Yikes! An impressive fireworks display, but rather worrying.
Was there too much sagging on two separate spans? Most of the action is on one span, but we can see a fair bit of movement on the cables off to the right as well, and at one point the camera pans round and shows arcing on that span as well.
I'd wonder whether it was breezy and this started the problem, but the weather looks rather foggy, which doesn't seem to go with windy weather.
