Dead hang from the rings with elbows fully locked out. To initiate move, lean back and drive hips up (aka kipping your body) toward rings, until hips and legs are parallel to floor and hands are about level with navel. Keep hands close together and elbows in tight.
Keeping rings as close to body as possible, drive elbows back, bending them 90 degrees, until body is positioned into the bottom of a ring dip, with legs forward.
Straighten arms to lock out your elbows, lowering legs toward floor to complete the rep.
Reverse the movement, bending elbows and swinging legs forward, then drop back down with arms extended and legs and hips swinging back behind you to get ready for your next rep.
Tip: Focus on folding your body into a V and aggressively opening your hips to drive toward the rings.
Note for newbies: Using a false grip on the rings (which places your wrist above the ring rather than below it) can help you get the mechanics down. Bring your wrist onto the ring, flexing hand toward your wrist so it’s bent, not locked. Doing a jumping muscle-up can also help.