From the mounted position Matt Darcy shows a few ways to disrupt the breathing of the opponent. If you place your hand over their nose and mouth it is illegal. However, grabbing your gi and placing it over the nose and mouth of the opponent is perfectly legal
In this part of his closed guard underhook clinch system, Matt Darcy shows how to instead sweep to mount when his opponent lifts their knee off the mat.
Matt Darcy caps off a drill from the last two weeks of class that highlights the details of why mount and back positions are the most dominant fundamental positions in jiu-jitsu.
Dave Camarillo shows the kimura finish from triangle mount with an option to transition to the arm bar.