car stopped accelerating while driving

While driving in the city, my car suddenly stopped accelerating and it died. What happened was my car jerked/stuttered once (it does this sometimes but this one seemed abnormal), then shortly after (less than 1 minute of driving), it stopped accelerating whenever I pressed on the accelerator. That car kept going on a really low speed and it seemed like it was just going to die, so I pulled over and turned it off. Tried to turn it back on, and it couldn't start again.

Took to mechanic and he said engine light code says "misfire from cylinder" but he says that doesn't seem to be the issue at all.