Ok remeber the key that desmond turned, that blew up the hatch so they dont press the button anymore and the electro magnetic field wouldnt be there anymore that sent the hatch door flying up in the air and it landed. At first i thought it was like a truman show thing too and i was like so mad

Charlie went through a lot. If u don't remeber when he was by the ladder entrance thing to the hatch his head was bleeding. This might mean he hit his head hard and could have had a concussion or something