This next sweep is how Trog counters people trying to drive their knees though his cross guard. You can also get the same sweep when people do this to your De la Riva guard.
You'll notice that this is almost the same sweep as above, only applied to a different situation.
We join the action with Trog already in cross guard. His opponent has stood and is trying to drive his knee though his guard to pin his leg and defend submissions.
From here you can see how he's gripping the pants. If you got here from De la Riva, you'd be grabbing the back of the ankle.
When he feels they are really trying to drive their knee though to the ground on the other side of his knee, he turns his hips and brings his legs to that side.
Here's where we try to slow time so you can understand the hip movement. He straightens his whole body, shooting his legs and and tries to launch his hips up and over to the left.
Action shot of his hips shooting up and his opponent fall over.
Shooting his hips up and over to the side collapses their base.