Strange that no-one has mentioned this before: at the ending, when all GlaDOS' parts are thrown into the incinerator, the roof seems to burst open and suck everything in the room upwards into the open air. First time I played, I thought it was an explosion, but that makes no sense - explosions don't pull you upwards and in any case, there is no explosion in sight, just white light above. It's like there's some sort of an anti-gravity device activating, or something...
It almost makes me wonder, if the Enrichment Center is even on Earth. I know, you see fairly normal landscape when you escape, but what if that's just an illusion, yet another stage of experiment that even GlaDOS doesn't know of? Yeah, this is purely paranoid speculation, but this is what pondering unexplained phenomena in the game-world leads to...
It almost makes me wonder, if the Enrichment Center is even on Earth. I know, you see fairly normal landscape when you escape, but what if that's just an illusion, yet another stage of experiment that even GlaDOS doesn't know of? Yeah, this is purely paranoid speculation, but this is what pondering unexplained phenomena in the game-world leads to...