From a livejournal community:
They were laying new power cables which were strung on the ground for miles. The moose are rutting right now and very agitated. He was thrashing around and got his antlers stuck in the cables. When the men (miles away) began pulling the lines up with their big equipment, the moose went up with them. They noticed excess tension in the lines and went searching for the problem. He was still alive when they lowered him to the ground. He was a huge 60 inch bull and slightly peeved!
I remember reading about this a while back (couple years ago I think). The moose had to be killed after it was taken down.
why was the moose kill?
Here’s a good article to explain it:
www.freerepublic.com/focus/f-news/1252425/posts
Basically, if they had tranq’ed it, the thing probably would have died anyway, only then the meat would have been unusable. So they shot it and donated the meat to the local shelter.