Originally posted by Sonic Boyster
I don't think he went super... just insane. The fact that his eyes dissapeered altogether and he just kind of lost it tells me that it probably wasn't an SSj kind of thing going on. He's done that whole "almost ascended saiyan" thing in other movies too.
Perhaps it is a semi-super saiyan, or demi-super saiyan form. He started to go SSJ, but didn't quite go all the way. He wasn't quite at the breaking point (though most of the movies couldn't have happened at all, given how most of them happen in the middle of a saga, like Movie 12: The Rebirth of Fusion: Goku and Vegeta occurs during the middle of the Fusion saga, while the Tree of Might happened right at the end of the Saiyan saga, or anywhere in the Saiyan saga after Goku trains with King Kai, since he knows the Spirit Bomb and uses it during the movie, but they couldn't really have occured in the continuity of the series).
Note, that whenever a saiyan goes SSJ for the first time, his eyes disappear just before he completes the transformation and they reappear as a bluish-greenish color.