"Ray, what're you doing? You're gonna kill someone!"
"No! I'm gonna kill all of us!" *wham*
I'm pretty sure that was shot, or at least storyboarded, because there's a scene where Ray gets mesmerized by the painting that doesn't really lead to anything. (I don't think it was necessary to telegraph that Vigo was going to take over Ray in the final encounter.)
Upon reflection, I may have seen that in some kind of secondary media ... a book or whatever. Might explain why I remember Ray as a shorter, pudgier Dave Coulier.
Now what's this about the Teenage Mutant Ninja Turtles?