Though not as serious, a similar situation happened to me a few months ago.
I was at my friends house for new years, and they are vets so they have four dogs, five cats, and a bird. They have a huge fake christmas tree with no ornaments, as the cats like to climb up the tree to play with them. They do however have lights on it. So we are sitting down watching tv, when one of their cats climbs up. It gets tangled in the lights somehow, and they form almost a knot around it's neck. So the cat's struggling, only making the lights tighter, as my friend tries to calm it down and wiggle it free. My knife was out of my pocket and open in a second and I was over to cut through the lights. Luckily, I didn't have to use it and he got it free somehow.
I was carrying a KC exclusive XHP native BTW.