Talk about a tough trek! Da Mao, a panda bear at the Toronto Zoo, was just trying to find his way through a serious snowstorm when he walked off a rock this week. By the time he realized what was happening, it was too late for the little guy to avoid his snowy tumble. The zoo posted a video of the sweet mistake on its YouTube channel, and it's already going viral. Watch the video below to kick off your weekend with a smile.