Fucking bloody hell, that was one amazing hour of television.
Again, I don't know if the original comic series explains the origin story of all characters, and in this case, the origin of:
But, if the comic book series doesn't, and Damon Lindelof went ahead and ret-conned an origin story for it..........then that dude has, straight-up, created one of the best pieces of comic-book narratives ever. It stands alone.
Not only that, it makes alot of logical sense to create such an origin story for that guy. It would explain alot of how the character looks like