Up. 
Let me tell you my story first before I write about the  film. As soon as this animation film entered into the Top 20 of the IMDb  ‘Top Films’ list, I decided to download the film in haste as I am kind  of sucker towards films that are being rated so highly by the IMDb  users. All that happened in June, when the film had just released and  only its CAM print was available on the Internet. That was kind of a  rough experience. Though the CAM print was more than bearable, it left  me unsatisfied; I even blamed myself for disrespecting an animation film  by watching it in one of the worst possible format of a film, the one  recorded through a camcoder.
Few months later the film finally  released in the DVD and Blu Ray, and I, as usual, set my eyes on  downloading the staple 480p BDRip. Though at that time Rajeev Masand  gave a DVD review of the film saying that the single disc edition  shouldn’t fool its purchaser, since it had loads of extra features  (about which I will write a little later) that bought good value for  money.
Now, as cynical as it may sound, I decided to download the  complete NTSC DVD-Image of the film – and so I did. After 10 days of  continuous downloading, I finally got what I wanted – a DVD-Image,  waiting to be burned on a standard 4.36 GB DVD. And oh boy, did I get  exactly what I wanted? Much more than that! I had virtually everything  at my disposal, the menu, ‘scene selection’ option, the ‘extra’ features  - all of which Masand was talking about. It was as if I had purchased  the Up DVD and was browsing it like anyone would after they have  purchased a DVD for 500 bucks.
Needless to say, the experience was magnificent. But what made my  enjoying the film even more was something which nobody would fully be  able to understand since their knowledge is restricted in only  appreciating the film, its plot, its character, but not what went behind  its making. Since I had the privilege of accessing the ‘extra’ features  of the DVD as well, I came to know about the amount of hard work that  was put behind in the making the film. 
There was this 20 minute  documentary, which featured the interview of the director and all the  creative thinkers that explained what made the film, especially its  strikingly realistic imagery of ‘Paradise Falls’ in South America. Now,  the complete background wasn’t made out of thin air, but it was a result  of rather much meticulous attention to detail. ‘Paradise Falls’ is an  imaginary name, yes, but its imagery isn’t. The complete crew of the  film went to Venezuela in South America where they spent considerable  time for their research. The ‘Paradise Falls’ and its surrounding  canyons was an amalgamation of Angel falls and Tepui mountains. In  Tepui, there was certain rock like structures that did resemble of that  of a human face, an animal, or any shape you can imagine -- something  which was incorporated in the film, when in one scene Mr. Fredrickson  mistook a rock for a man. Or even the brief scene where Russell and  Fredrickson struggle under a thunderstorm and the resultant incessant  rainfall was inspired from what the crew experienced in their stay in  Tapui. There were several other things that were incorporated. The  Paradise Falls is, of course, an imitation of the Angel Falls, though  the director told that he made it look a few hundred meters more steeper  than the original Falls, which, by the way, is already the highest  waterfall in the world. 
The other contents in the DVD contained a  cute, 10 minute animation clip, ‘Partly Cloudy’.