Seems like the throttle is stuck wide open

What is your question?

When I turn the key to start, the engine races so fast that I have to turn off the key to keep the engine from blowing up. Immediately leading up to this condition driving home, I noticed the car continued to accelerate when I applied the breaks, and I punched the accelerator pedal to try to "un-stick" it. It worked twice, but now there is no control with the pedal. It's as if there is no pedal, just open throttle. Could it possibly a broken throttle cable (if there is such a thing)?