I always thought helicopters did not move under their own power but were repelled by the earth for being so ugly...
Another question. I have heard that, amongst others, Heathrow may be going to be experimenting with using tugs to take the aircraft from the apron to the hold, and then starting the aircrafts engines only at the hold. Environmental concerns such as fuel consumption, noise etc. are the reason for this. In this case, the aircraft is not moving under it's own power, but it is moving with the intention of taking off, and there is a pilot in command. How to log this?