Uprise to Catcher's Lock

Start sitting on the bar and initiate a Catcher's Lock as usual: slide down to knees on the bar, grab the bar with your hands and then take your legs out. Once you are swinging underneath the bar, get up into an Uprise position at the backend of your swing (the catch point) and then at the frontend (the apron) roll forwards, catching your legs on the cables in a Catcher's Lock position. You are then ready to make a catch.

Note that this process takes one extra swing that the usual transition to Catcher's Lock, so the timing will be different.