[As soon as Ren tries to push back and fails, Shun shifts his grip and pins Ren's wrists at either side of his head to finish the move. His weight on his upper half is enough that it might even be a struggle to lift himself up enough for a headbutt or similar, and he moves his legs to push at either side of Ren's and trap them together to prevent a retaliatory kicking of any kind as well. Let it not be said that he isn't thorough about this sort of thing.

That's largely because Shun has at least one comment to make here, and he'd rather it not be interrupted by Ren deciding it's a good idea to try something else. For all Ren did manage to catch him off-guard at the start, his comment is typically detached and professional as he tends to be around these matters.]

Your timing was good, but anyone with experience will be fighting back before you can pin them fully. If they turn it into a match of strength like I did, you still don't stand a chance against that, especially if you start yourself on the bottom. Not to mention most enemies aren't going to be offering you a hand up and willingly leaving themselves vulnerable.