This happened to me.
Very unsettling feeling to be driving 70 mph, to turn the wheel and have nothing happen. Slowed down, and figured out that if I turned the wheel 1/8th of a turn, over, and over, and over again, I could get the car to move the direction I wanted.. eventually got to pull over.
I remember walking around to the front of the truck, seeing one tire pointed west and the other one pointed northwest.
My best was at HUMMER. Jumped in a H2 after having a set of aggressive wheels and tires put on it. Headed home and after my second intersection turning left the front passenger wheel and tire kept going straight. When I had the H2 towed back I had the same mech take care of it. Never had to say a word, never happened again
Like UL, I was sure glad it happened in the driveway, rather than on the road!