Accelerator Stuck problems of the 2005 Volkswagen Passat

I was turning onto a local busy street when my accelerator stuck to the floor and quickly shot up near 50mph. I had to quickly weave through traffic to not hit anyone while it stayed in a high speed. When I'd press the brakes, the car would slow down but still be going. When I let off the brake pedal, it quickly shot back up to 50mph. I was lucky to be able to turn onto a side street maybe 1 minute later and avoided hitting anyone else. I am beyond surprised that I was able to avoid hitting anyone with the amount of traffic. The pedal only came up when I put my foot under it (going slower/braking on the side street). It was normal after that. Extremely scary experience with an otherwise flawless vehicle that I have owned for going on 4 years.