... Nice video by the way. Spoiler Just now I realized that there's a bug: The moon still has gravity, just less than the earth, thus Wheatley couldn't fly away in space but should have bounced back to the moon, and get stuck on the moon?
Spoiler I think he was pushed away by the air flow from Earth, as the Moon has no atmosphere. But you're right, he has to go very far from the Moon to get to float in the void without falling back...
Spoiler I think you are all overlooking the obvious; WHY DID CHELL NOT IMPLODE WHEN SHE WENT TO THE MOON?
Spoiler Gravitational fields extend through the complete universe, you will alway fall back given enough time. Wait, how is this a spoiler?
Well, with earth having a bigger gravity then the moon (1/6th of the gravity of earth), a body could get between earth and moon, and be far enough from the moon to be pulled away from the moon by earth. that would be 1/7th of the distance I guess... but as I dont remember the specific formula's for gravity anymore (long time ago) it could be a little difference. Also for ppl not knowing about it, one can end up in a "lagrangian point" where you wont ever fall into either body. <a class="postlink" href="http://en.wikipedia.org/wiki/Lagrangian_point" onclick="window.open(this.href);return false;">http://en.wikipedia.org/wiki/Lagrangian_point</a> (and I mean the L4 and L5 points)
You actually need to start with technology of portal creating. I always thought that it's based on wormholes theory. So one way to make such a portal is to take one entrance of the wormhole and move it to within the gravitational field of an object that has higher gravity than the other entrance, and then return it to a position near the other entrance. ?!