So Jacob was obviously able to leave the island, even though Man in Black was not. How did he leave the island? Did he have a submarine or other type of boat? Did he poof off of the island and land wherever he wanted? Did he turn the donkey wheel?
What was the purpose behind Jacob's visits to the Losties? Did he actually have to touch them to make sure they came to the island, or did he just have to do something in order to get them on the right path? Did Jacob do this with others who maybe proved unworthy to go to the island and therefore we didn't see them?
Did Hurley ever leave the island when he was in charge?