Night rallies don't have the best visibility to begin with. Add snow, and you have far less grip and stopping power than usual. Add a car out on course that you can see, but can't stop for and it's the stuff of nightmares.
You can see the car coming down the stage long before the rally car hits it at speed. There's no opportunity to slow down.
These are the worst kinds of crashes. Sure, you're driving (or codriving) the car, but you end up as de facto passengers to your own impact.
Fortunately, all parties in this crash were okay afterwards, but this definitely makes my short list for Scariest Crash Video of the Year.