- Get a very high mount with your knees under his arm pits if possible.
- Wrap up an arm with an overhook and slide your knee towards his head on the same side.
- Get wrist control of the other arm and push it to the matt.
- Sneak your other leg up and over the opposite arm.
- Pull body towards you with overhook and while maintaining wrist control, slide leg under head and cinching the choke.
This is a nice “baiting” move to get it started easily (untried):