Originally Posted by dom93hatch

Also at the end, if you notice, Cobb's kids look like they've never aged. They look the same throughout the whole movie. In the film's first memory of the kids, they're doing the exact same thing and wearing the same clothes as they did at the end. Could it be that Cobb never actually left Limbo? Because it would be impossible to have a memory at the start of something happening in the present.