T-Rex: I like movies where there's some magic and then the next morning two people wake up inside each other's bodies!
God: GROSS
T-Rex: No, I mean like - their consciousnesses have switched places!
God: OH OKAY COOL
T-Rex: But what I don't like is when they get out of bed and look in a mirror and only THEN do they realize something's wrong. It's ridiculous!
T-Rex: You're intimately familiar with the size and shape of your own body: you're not going to NOT NOTICE when it changes. I doubt you'd even be able to get out of bed without falling down, your feet hitting the ground in unexpected ways.
Utahraptor: Your center of gravity would be all messed up too!
T-Rex: Exactly!
T-Rex: It takes us MONTHS to learn to walk, and that's just for one body! Change all the variables at once and there's no way. Heck, if breathing wasn't automatic I'd expect we'd all suffocate to death as soon as we switched!
Utahraptor: These certainly are valid objections to a magical event that has never occurred.
T-Rex: I know, right? To be fair, I do like it when they all gain a new understanding of each other at the end. Just show me several hours of them flopping around on the floor like fish first!
T-Rex: SCIENCE DEMANDS IT, DISNEY/TIME-WARNER