In the Butterfly Effect trailer at the theaters you can see CKR pretty well plus one of his lines is played.
He's shown about halfway through the trailer. He's the guy in the hospital gown sitting across from the table of Ashton Kutcher---CKR lunges over the table to get at AK and there's some line there.
On tv there are two versions of the trailer. In the shorter one only CKR's back is shown as he lunges over the table.
In the longer one you can see his face, but you can't hear him speaking.
I knew that CKR was in Butterfly Effect (from reading his IMDB page a few times) so I was looking for him in the trailer. I recognized his profile and then saw his face.