Whack... THUMP... thud... THUMP After my coworker left right at the end of the work day, I started hearing this noise. The first three times I heard it, I thought it was the cats making mischief in the other room. Then It happened again and again. At least once every 5 minutes. Every time I thought it was my other coworker coming back, slamming the door behind her. Then, no human would show themselves after the noise. I was able to ignore it until a really loud THUMP happened and I went to investigate. The cats were all cuddled on the bed, not a cat. I explored the front door, quiet. I turned on the light to the porch, nothing. I went back into the living room to go back to what I was doing and I heard it AGAIN. Then it hit me, we just got 18 inches of snow and its now 40 degrees. That snow is sliding off the roof like mad. I caught it out of the corner of my eye. After the thud, I looked out the window of the porch and saw a huge pile of snow before the THUMP. Standing in the ...