Okay, the headline may be an exaggeration. After all, I don’t know if records exist for such things and if they do, I didn’t look for them. However, be it a record or not, this is still an absolutely amazing natural phenomena.
In Wyoming, recently, a large amount of rain and snow-melt has resulted in unstable conditions. This, in turn, lead to a massive landslide in the Snake River Canyon, which came down across Highway US 26-89. Even now, days later, the landslide is still moving at about a half meter (18 inches) per hour. The Wyoming Department of Transportation has been following it and took a time-lapse video which can be seen below. To get a sense of scale, pay attention to the man who enters the video and walks around RIGHT ON THE LANDSLIDE.