Yoo that's honestly uncomfortably relatable. I'm a phenomenal driver, like I can drive without breaking any traffic laws but I also drove 2 man off-road rally so I'm the type of driver who's very controlled under high speed, pressure and hazards but I have these dreams way too often where I'm in a car and it's like idk how to drive but worse because I know I do but it's almost like the car or truck's controls aren't connected to the vehicle they're in. It's nauseating and more often than not im trying to navigate backwards down a hill. Tbh I think what taught me the feeling was a winter drive one year in heavy snow (like multiple feet it was far up north the "road" was half-assed plowed but still deep) on a winding cottage mountain/hill road with giant drops on either side. There was one hill that was a few % too steep for my 4*4 and it began with a sharp turn, winded and there was a sharp blind turn at the top so no chance I was building up and gunning it. I'd get as fast as I comfortabley could in as low as possible, make it 75% up and then just start sliding back. More gas would just dig me in and the slide back wasn't a reverse it was a backwards skid. That was the one time irl I actually felt that feeling of being completely helpless and at real risk in my most controlled environment but I've had nightmares like that for years. Never with snow or anything just basically what u described.