South Africa fast bowler Dale Steyn put his superb bowling show down to a ball change after the tea interval on the third day of the first Test against India in Nagpur.
Steyn destroyed India with a fierce spell in which he claimed a career-best seven for 51, bowling India out for a measly 233 and handing South Africa a first-innings lead of 325.
India was fairly well placed at 221-4 at the tea interval, but Steyn returned to pick up five wickets in 3.4 overs after the interval as India caved in meekly.
"We actually had the ball changed when we came out after tea because the seam had popped open on the old one," Steyn said.
"We hoped to get a bit of reverse swing, it worked in our favour and it was good really."
India finished the day on 66-2 in its second innings, still 259 behind, with Steyn having taken his eighth wicket of the match.
South Africa had little time to prepare for this series, the few days between the series against England at home and its departure to India overshadowed by the resignation of long-standing coach Mickey Arthur.
A packed schedule had offered South Africa only a two-day warm-up match, but Steyn believed his team had adapted well.
"We have been speaking about these kinds of wickets and one thing we talked about in the change room is to try and adapt as quickly as possible," he said.
"I think we were capable of doing that, we hit the right areas with intensity and things went well for us.
"There are days when you bowl the spell of your life and not get a wicket and then you have days like this and pick up a lot of wickets.
"I think we worked out quite nicely what we have to do in these conditions."
On Graeme Smith's decision to enforce the follow-on, Steyn said: "The batters actually came up and asked us if we had enough gas in the tank to bowl another 25-27 overs to stumps.
"We already were 325 in front and we thought that if we could pick up a couple of wickets we could speed up the game and hopefully have it in the bag.
"Of course we could have come out tomorrow and done it, but the bowlers said yes.
"We felt we had enough fuel in the tank and we could do it again.
"Hopefully we can come out and do it again tomorrow."