Earlier in the week, the 36-year-old right-hander rewrote the history books when he overtook Bert Sutcliffe as Otago's leading run-scorer in first-class cricket.
Yesterday he was in a record-breaking mood again - this time in one-day cricket. He combined with Nathan McCullum for an Otago-record stand for the fifth wicket of 143 and went on to post his highest one-day score, a superb innings of 123.
"Cricket is one of those games," he said when approached for comment during the lunch break.
"You have your ups and downs and you've got to enjoy your good days.
"But the job is only half a job done. It will mean a lot more if it is a winning hundred."
Cumming, whose previous high score was 112, brought up his fourth one-day century with a majestic lofted drive that sailed over the long-off boundary for six. He celebrated by dispatching the next delivery over long-on.
It was a magnificent innings, perhaps his best in one-day cricket.
It was not chanceless - he could have and probably should have been run out on 42, and he hit the ball in the air and perilously close to the fielders at times - but he paced his innings superbly and lifted the tempo exactly when required.
His partnership with McCullum surpassed the previous mark set by Marcel McKenzie and Peter McGlashan of 130 against Northern Districts in Rotorua in 2002-03 and set up Otago's imposing total of 295 for six.
McCullum joined Cumming at the wicket with Otago faltering at 107 for four and also played a delightful hand. The all-rounder batted with more patience than he has in recent innings and gapped the ball well.
Most of his 56 runs came in multiples of one and two and he got out only when he was looking to force the pace towards the end of the innings.
