Call it what you want

The snow had been building and building. It grew and piled and slumped and fell, and, thanks to certain magical properties, tried to reform. Only gravity and memory snow did not always mix. All around them the basin-like surroundings began to heave and groan. The bridge began to shake slightly as bits of snow began to trail and fall. But, due the nature of the memory-snow to reform itself, some of the snowballs tried to make their way back up, much to the disapproval of the laws of physics. With a sound like the scream of a rock, the bridge began to shake in earnest now. Rocks fell and tumbled and the bridge began to sway back and forth violently as snow burst from the surrounding chasm racing towards the bridge from either side. There were two options to evade the oncoming avalanche: to go up, or down.