First post here
It happened to me two days ago on the track. It was my first trackday, second turn of the day. The main straight finishes almost exactly at the end of 4th gear. I'm very used to downshift to decelerate on street, and therefore I've downshifted to 3rd when I was barely starting to brake. Revvs jumped over 8.5k rpms. I've changed asap to neutral, but a good second passed before I've corrected.
The car seems to be fine, I've babied it for 2 full laps, listening to sounds etc... Since the car was pulling fine I've pushed and I've attained my record lap just 5 minutes after the miss shift.
It's however 2 nights that I can't sleep: I really love my car and I'm worried it will result in a major engine failure sooner or later.
Video:
https://vid.me/G2cJ