This is the clip!!! Brenda's calf muscles are super thick and ripped. I got some really cool angles in this one. She flexes standing, seated and on a tall bar stool for great underneath and on her side shots. Her calf muscles are comparable to Yvonne McCoy's here. She flexes in heels before taking them off for bare feet flexing. Kelly joins her for awesome double muscular calf flexing. They pump their calf muscles together with alternating foot action and then with both at the same time. This one will knock you off your sit in HD!!