Fishermen saved her cubs and then, the mama bear surprises everyone with her actions!

They try to swim across a frozen lake in the icy cold of Russia but things don't turn out as planned.

Do you know the feeling of being on the edge of your chair while watching a documentary about nature? You look up at the end of the film and realize that it's been hours. This is exactly what we felt after hearing the story of the mama bear and her babies.