The Primes were hanging out on Earth building a sun harvester. Fast forward a little bit, and by some random fluke, the Allspark just so happens to land on Earth, too. What are the odds? Whacky. But what a minute. A few thousand years after that, the Ark just so happens to crash on our moon? Of all the places in the galaxy? No way, man. I hope they throw us a bone here as to why all these things happened to the same planet. Although I realize I'm probably just going to have to turn off my brain and accept the BAYSPLOSIONS! Which is ok by me. But still. Seriously?