What will happen when the sharpest spear meets the strongest shield?

If you tell me that when

- you have your opponent's wrist, you will apply a painful lock on him.
- your opponent has your wrist, you can take your hand away any time virtually as if it is not being held at all.

What will happen if you "travel back in time", meet yourself, and use your right hand to grab on the right wrist of "another you"?

Your thought?