Board Thread:Fun and Games/@comment-35585214-20190218111718/@comment-28362353-20190218224648

Redder123 wrote: It was questioned why goku didn’t go MUI.

It was because he can’t. He stated it before the movie and during the movie there is a scene where he tries to go UI but comes up short and goes SSB instead. Its not that he cant go MUI again. Its just that he can't do it on command. It only activates if he's in extreme peril.

As for the part where his hair flickers silver, I don't think that was him trying to go MUI. If you remember Vegeta's hair turned green before going SSJ, but it didnt mean anything, it was just something the animator chose to put in, and I think Goku was the same way. I think that Gokus hair flickering silver was just a nod to MUI, not Goku actually trying to go MUI.