So, what the hell is happening here? Luckily IFL Science has the answer:
Ice shoves occur when strong winds or currents force the ice from the water’s surface to go on land. These events are also called “ice tsunamis” because of the way they come on land, but ice shoves are closer to icebergs than tsunamis in how they work.
The force from the ice shove can be powerful enough to knock over trees, houses, and docks that stand in its way.