Car commercials always include the obligatory shot of driving through mountain roads. Just take a look at the ad for the new BMW X7, for example.
Isn't it majestic? Doesn't it make you feel free? Alive?
There's something they don't tell you, though: mountains are made of rocks and slopes, and when ones of those mountain rock rolls down one of those mountain slopes, all hell's going to break loose.
Reddit user etymologynerd shared a dashcam video that looks to have come from China, under the wholly appropriate title "Welcome to my worst nightmare".
Seemingly out of nowhere, a boulder drops onto the road and crushes the hood of an oncoming SUV, before pretty much just shattering a tree or two downhill. If that weren't bad enough, the driver of the vehicle with the dashcam (who probably should have checked on anybody in the SUV before driving off, just saying) seems to have second thoughts about trying to get out of there, as two more rocks fall onto the road ahead.
Yeah, that's my trip to the Sierra Nevada canceled.