In the plane crash scene when the red raft supply bag gets caught, the line holding the bag snaps and Chuck is free. Later, when he washed up on shore, you see a part of the red bag still attached.
95% of that bag ripped of when the plane pulled it down. yet supprisingly there is enough bag to hold a bunch of coconuts when Chuck goes for a hike up that hill.
Yes the red bag DID rip cleanly off. It didn't show the bag rip or tear or anything like that. It caught, then it snapped. There is a shot of the rope rising up without it. I just rented the movie last night, and just now Fast forwarded to that part.
When he washes up on the beach, there is red attached. This is definitely a slip-
up!
I just re-watched this part on DVD. There was a tiny piece of red left when it broke in the water. On the beach, there is a much larger section of red left. It is significant, because they made such a big production out of showing it break off in the water.