I fear they are missing somewhere like the Thai students whose car is stranded in the middle of the raging Kings River in Kings Canyon:

News video: yourcentralvalley.com


Picture from Bakersfield Now


From the other pictures that show the mangled guard rail they went through, I can only think of one possible reason, and this may also relate to the missing couple from the post above...

Some people who rent cars and drive into the mountains for their first time know NOTHING about overheating brakes. Leave the car in D, and ride the brakes down any of those long grades, and brakes will overheat, and eventually fail completely.

I'd bet real money that the brake rotors on that car are toast.