Posture first, then opening the guard from the knees or standing: pin the wrist, turn the knee into the hip, keep the leg vertical and slide their leg down it.
No-gi standing guard break: control the grips, walk the weight back, technical get-up while managing the legs, and keep the feet far enough away to avoid ankle sweeps.
Three ways to open a closed guard including a kneeling break with the knee in the tailbone and an unorthodox grip on the bottom foot. Elbows stay tight throughout.
Wim Deputter treats the can opener as a closed-guard opener rather than a cheap crank, including when it is legal and how the bottom player should respond.