Not much to tell. I went crazy. Hurt people. Killed myself. And now I'm back. Oh, and I betrayed two people who loved me in the worst way possible. That last one's a kicker. And after all that, I had my needles taken away. I'm not a threat to anyone right now.

[The organics were never much in danger, since Chromedome doesn't consider any of them a threat. They're just organics after all. Squishy mortal things that only live for a few centuries at a time.]

Now all I want to do is earn back the respect of my friends. That's the Autobot way.