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I watched an interesting video clip on how to escape when mounted. The guys on the clip state it’s a technique that can be used if the traditional escapes fail.
I like to introduce unique techniques to my game because of the shock value. I find that you gain valuable time to pull off some of these moves because of the split second delay that occurs when your opponent realizes that you are trying something different. Time that can be used for a reversal, to gain positional dominance or a submission.