987 Engine Failure Help

[husker boxster]

You can't over-rev the engine if you drive it up to redline. You have a rev-limiter that will prevent you from going into the danger zone and bending valves. If you miss a down shift (5-2 instead of 5-4), you will over-rev your engine and cause problems. But my understanding of your description is you did the former not the latter, so no need to worry about over-revving.