It's the Montagues and Capulets on a much larger scale. It's the big-enders and the small-enders. It's England versus Ireland and Scotland and all the inherent socio-economic class struggle therein. Throw in a little Inception visual skewing and you've got yourself Upside Down. And let's not miss out on the Adam and Eden reference, a bringing about of a new world order via, you guessed it, love. Yes, apparently love can conquer all. But here the lovers have an additional element to overcome: physics. And if you've got a problem with the physics of the film, lighten up. Nine out of ten sci-fi films have issues. Keep in mind that it's fictional entertainment. No one's trying to create a world perfectly fit to reality. Let it go. Upside Down has enough going for it to keep most engaged and entertained. It's a love story or love that is to set the world right side up in the end, at least politically and socially. It's a well crafted film that is entertaining with a believable connection between Sturgess and Dunst. Bottom line, it veers from the majority of films that use a few plot lines over and over again. And if you don't like a little cinematic implausibility or the romantic, even overly romantic, go read a science journal and stop wasting our time with your pointless critiques.