What a dog does when it's home alone

      |Nick Dietz compiles some of the week's best viral videos, including an extreme backflip fail, 49ers head coach Jim Harbaugh doing pushups with a walrus and a world record car jump gone wrong. Plus, one dog playing "the floor is lava" and another taking liberties with a bed while its owner is away. To see these videos in their entirety, click HERE

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