Funny story about this scene. I first found this while at a rummage sale. There was a big table of children's books and I randomly picked this X-men book up. To my surprise, there was this amazing gas scene in it! But unfortunately, I left the book at the rummage sale because I didn't want to be seen buying it (stupid decision in retrospect). I remembered the book title though.
Fast forward about a year later. I do a search in my local library and manage to find this book! I check it out along with a few other random books, scanned it and posted it here.
I will goto great lengths to find great scenes.