Here’s a remarkable video of some people in a small boat, equipped only with a single little knife, cutting an entangling net off of a humpback whale. The net had pinned the whale’s fins to her sides and entangled the tail as well, so that she was unable to swim and appeared exhausted and possibly near death.

After the people succeeded in getting the whale free, it danced on the surface in apparent joy. The whole thing is worth a watch, but if you don’t have time, skip ahead to a bit past the halfway point and you’ll see the gist of it.

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