This is a dirty little technique that Scott Epstein also known as 'Einstein' is demostrating in the video above. Well, I guess it's not that dirty if you are in a fight, right?
As always the first thing you want to do is break your opponent's posture down. Then you want to go straight the Mission Control and transition to Crack Head Control.
Once you are at Crack Head Control you are going to make a fist with your free hand and drive your fist into your opponent's neck to get the tap. You can go for the artery and make it a blood choke of the Esaphagus ( did I spell that right? ) and make it an air choke.
I would say to stay away from the Adams Apple to avoid collapsing your partners windpipe in training. This isn't something you can slowly apply to get the tap. The best thing is really go for it and drive the fist into their throat to get the tap before they flip out and fight back for their life.