Cross Armbar from the Mount - Video

UPDATE: I didn't explain this well when I made the video, but what made this opening happen was that Sam posted on Mike's face. When he did that, Mike tried to push him away, giving up an arm, which Sam took. That's what you should take from this, I think. W got that tip from Mark Hatmaker's excellent book, "No Holds Barred Fighting: The Ultimate Guide To Submission Wrestling." I'd recommend it.