This is actually a great escape from the cross face position in side control, but it presents alot of problems to the guy doing it.
The first is that a dynamic fighter will not sit there and let you roll over. If you've given up the cross face position, he's going to do one of two things.
First, he may try to maintain the grip and slip his head under your arm to get the arm triangle. That's the more complicated movement, but once you get the head under you either have the arm-triangle sunk in, or you're in a great position to take the back.
The other possibility is he can step over and spin for the armbar, since the crossface sets him up perfectly to hook the arm (all he has to do is force your head out of it). It's a good approach to getting out of the position, and the bridge up also sets you up pretty well for a spin that will bring you back to full guard if you need it, the same as a straight hip-bridge escape.
This escape does set up the armbar from both sides, so be aware that he might try to hook your elbow and break your arm, but if he doesn't the technique will probably work.
Good video, repped.
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