In spite of Sharlto Copley's heavy South African accent director Joe Carnahan knew he was the man for the job. "When you see him in the movie, there's not a shred of that." Carnahan confirmed, "He's doing this pan-handle Texan twang that is unidentifiable"

Copley had met with Dwight Schultz, the original Mad Dog Murdock, who confirmed that he would use a vague Texas accent most often when playing the part.

"Sharlto is such a great actor" Carnahan continued, "He has the ability to mimic and compartmentalize each accent. He'd say to me: 'I could go more here, I could pull back there;' it's pretty remarkable he was able to shed that so easily."

The South African seemed to be tireless Carnahan marveled that, "In fact, we got flack from the studio one day, because we shot nine rolls of film of just Sharlto in this one scene; he just kept going and going and going!"

source: movieblog.mtv.com