It appears that you have checked your oil, if fuel gets into the oil and overfills it you will have a runaway, more at higher RPM than lower at first as the oil is churned up by the crank more / more windage.

If it does start to run away, do not pop it in neutral or you'll likely stand and watch the engine rev itself to death. If you can get the car to a stop in drive and shut off the key you have a better chance (not always).

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Gone to the dark side

- Jeff