It all started with the latest
Star Wars VII trailer.
Once Upon a Time co-creator Adam Horowitz tweeted out that he was excited a
Star Wars commercial aired during his show, and Shatner felt it necessary to express his displeasure with a photo of himself, because hey, he's William Shatner, why not?
Horowitz responded to Shatner saying tweeting with him was an even bigger deal, but Shatner wouldn't let up: