This is a "widowmaker" Porsche 911 GT2 on the Freies Bergrennen hillclimb in 2012. The driver loses the back end on the narrow mountain road. How he manages to keep the car out of a massive crash is beyond me.
The video is old, but it recently resurfaced on American rally ace Crazy Leo's Facebook page as a lesson of "teach your kid a proper hand-over-hand steering technique."
I just can't believe the driver made it out unscathed.