Apologies for the slight thread drift but to answer Fonsini's question:
Yes, there is a weight on wheels switch preventing, amongst other things, in-flight reverse selection. AS for on the ground, on the TTTE course at Cottesmore back in the mid 80s most of the students with previous experience were either from Lightning, F4 or F104 so were all used to rocking outboard for take-off so we were somewhat apprehensive of our early Tornado take-offs. As to how often it happened I am not aware of any recorded incidents but they certainly happened including me. At take-off power you could, we were told, tip the GR on its tail if you didn't immediately cancel one's error whereas the F2 & F3 with their longer noses were more forgiving. Indeed at low RPM you could even reverse taxi.