They'll never know it, but the ice saved their life. They were about to take their raft out on the *ocean*, they don't know how that works!
Oh noes! They lost the raft?
It's ok, that raft was going to kill them!
Oh man, this is going to be a lot tougher than they thought!
If there's anything Gilligan's island taught us, it's that leaving an island is very difficult!