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On Friday, venture capitalist and apparent animal prank enthusiast Steve Jurvetson uploaded a video to YouTube of a real dog (Cosmo, who belongs to Andy Rubin, the founder of Android) freaking out over a robot dog ("Spot," who belongs to the fascinating robot/nightmare creature creating company, Boston Dynamics).

Is Cosmo threatening Spot? Talking trash? Playing? Trying to protect humans from the eventual robot uprising? We may never know.

This is just another battle in the long-running war of dogs against robots, as evidenced by the many videos well-meaning and unsuspecting humans have posted over the years.