Rampage Jackson MMA trivia help needed...

I have a question that has been bothering me and I can't find the answer. A highlight video of Rampage Jackson was taken down from youtube. In the highlight video it showed an entrance from what looked liked his early days in PRIDE. In one particular clip he is making his way to the ring in what appears to be a luchador mask similar to this (http://i.imgur.com/uprX6B8.jpg) from what I remember.

Can anyone tell me what event this was at? Or does anyone have a picture or video of this entrance?

You are a gentleman and a scholar! Thank you.