I revved the engine when starting by mistake.

Toyota fixed this problem by cutting about 3/4 inch off bottom of accelerator pedal - installing an upgrade flor mat with a larger relief cutout for the gas pedal .. Problem mysteriously disappeared after that.. I know this is fact as I own two of the vehicles that were recalled - I never had it done - i simply replaced the floor mats with ‘Toyota’ upgrades.

IF you have the correct application floor mats - make SURE they are securely fastened to the factory anchoring fixtures and lay on floorboard as intended. Over the years - I have seen the results of improperly installed or incorrect floor mat applications on drivers floorboard .. This can be a very serious safety hazard as the mat can shift while vehicle is in operation and apply unexpected pressure to accelerator pedal. Just be careful !