quote:
Originally posted by saralk
You don't actually see how high the water level gets too, you just see that water is going up. Maybe Charlie, in a "greater good" moment realises that unless he dies, Claire wont get rescued unless he drowns, so he is going to stay in the room, even if he doesn't drown he will die due to asphyxiation.
It definitely shows the water level above the window after Charlie shows Desmond what he wrote on his hand and we see him just floating there...
EDIT: Got a picture of it: