I think what he was saying was that the pull of the Earth on your body would still be the same in the plane if it was doing a parabolic flight and you appeared weightless, or if it was a regular flight and you didn't, so long as you were at the same distance from earth?
I just want to make absolutely sure, but does anyone know if you actually do weigh less in a plane, and if you do, is it measurable?
Obviously a flying aeroplane, and not one on the ground ;)
Thanks! Jess