I'll keep this brief as i don't write very well but i thought a possibility for what the incident could be and even how it could relate to jacob. Perhaps when two people exist in the same time and come in contact with one another an incident occurs in which they become displaced in time. Miles is the only one we know of( if he turns out to be changes baby) who exists twice in this time period on the island. now i don't think he is jacob. I figure it is more likely jack's dad is on the island now and perhaps even jack somewhere they will meet and jack be the skeptical idiot that he is despite everything he has seen will touch his past self. He'll then become displaced in time which would allow him to exist at any point on the time line of the island. this will be the incident. mind you replace jack with anyone else you might consider to be Jacob. As for why the younger self may live on without being displaced to co! me back and make contact in the first place, I figure it would just have to do with the fact that the person's future self shouldn't even exist. Sorry for the lack capitilizing where necessary or knowing when to start a new paragraph. Tell me what you think. Theory by pjw5383
