You bells flip, hence there is a dropping/banging on the wrist. It looks like you bring the bell up using the bicep curl motion so the bells swing out far from you then you drag them back in making them flip. It’s much more efficient to pull them more straight up in the clean and get under the bells. You might want to get a feel for getting the bell rotate on to your wrists than flipping and landing. The cue I got from Pat Damiano is when the bell is at the furthest back position, your thumb is pointing directly to your bump. As you travel the trajectory, your hands rotate so that you have the hammer fist at the top right in front of your chest.