Stuart Broad cited England's decision to bowl a fuller length as key to his match-winning spell on day three of the third Test with South Africa.
Broad tore through South Africa's top order at the Wanderers on Saturday, claiming 5-1 from 31 balls in a sensational period after lunch and finishing with figures of 6-17 as the Proteas were skittled for 83 in their second innings.
England duly knocked off a modest target of 74 to secure victory and an unassailable 2-0 lead over the world's top-ranked side ahead of the final Test in Centurion.
After being named man-of-the-match, Broad - who struggled with illness on the opening day - said: "I fell into the trap in the first innings of probably bowling a bit too short and getting carried away with the bounce.
"So we had a chat with the coaches and the bowling group before we went out in the second innings and we talked about bringing the batsmen forward a lot more, using the bouncer of course, but trying to get the edges from a fuller length."
Broad, now up to third behind team-mate James Anderson and Ian Botham on England's list of leading Test wicket-takers, has developed a welcome habit of producing devastating spells, with this latest effort coming only five months after he returned 8-15 in the fourth Ashes Test at Trent Bridge.
Yet the 29-year-old reflected modestly on his performance, adding: "We got lucky today, the lights were on, it was perfect conditions to bowl.
Broad continued: "We got the ball in good areas from both ends and created that pressure. 'Titchy' [James] Taylor took some great catches at short leg, we took our opportunities.
"I got in a rhythm from the far end and I think it was a good day to bowl. The wicket just offered a little bit off the seam and in the air, and for a 6ft 6in bowler there was a bit of bounce there as well.
"I wish we could take that wicket around with us to most places, I must admit."