This was really well done. I'd just like to point out a few things, as someone who's watched Inception way too many times:<p>1) It is never said that 3 levels is the maximum depth of a dream until Limbo occurs. My interpretation has always been that Cobb and Ariadne hooked up a shared-dream machine to Fisher's dead body, which brought them into Limbo.<p>2) Why are there 2 Limbos? There's the one Cobb and Ariadne follow Fisher and Mal into (which has the architecture of the Limbo that Cobb and Mal shared all those years ago). There's then the Limbo that Cobb and Saito share, where it looks like Saito architected the environment (Asian influences). And if they were the same Limbo, why was Cobb washed up on a shore with no memory of how he got there in Saito's Limbo?<p>3) In the Limbo that Cobb and Mal shared, all they needed to do was kill themselves to wake up. Why then was the defibrillator needed to wake Fisher up from death in Limbo to Dream 3?