Trying to play "pulled up" by the Taking Heads. The fill part with the fast strumming has 3 parts with 4 fast strums each followed by 2 more quick strums. I can play it slow, but can't pull it off at full speed. So, any advice to play faster? Loose wrist? Hold wrist stiff and move the elbow? I've never been a super fast Strummer, but I love that riff.