Sounds like you somehow triggered the ECU to go into "limp mode".
There are a number of ways to do this. Usually surrounding heat (oil temp or coolant temp) or oil pressure (hitting the twisties or braking real hard when your oil is a bit low will cause it to slosh abound and pressure fluctuates).
After sitting a while, does it start back up and feel normal again? If not, take 'er in.
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