Jason Day cards 64 on Friday
Jason Day of Australia played the equal greatest second round in Augusta National's history - an unblemished eight under par 64 - that moved him to eight under and second place overall.
Day trails Northern Ireland's Rory McIlroy, who backed up his opening round of 65 with another impressive 69 on Friday to lead by just two shots heading into the third round.
Day said after his first-round 72 that he had been a delighted spectator as playing partners McIlroy and Rickie Fowler (70-69) set the course alight.
But on Friday the Queenslander's took centre stage.
Despite a birdie on the par-five second, he was slow to get going and was still only one under through six holes.
He then birdied the ninth, 11th, 13th, 14th, 16th and 18th holes to roar through the field, first passing Ogilvy, who is tied for fourth at six under, and then Korean crowd favourite K.J. Choi at seven under in third.
Ogilvy's second consecutive three under par 69 was special, too.
The Victorian had to overcome a potentially major hiccup on the par-five second that could easily have derailed his challenge.
In the perfect layup position right next to the green for two he hit a poor pitch and left himself a 12m birdie putt.
What followed - a stunning four putt - might once have battered his chances. But typifying the serenity he seems to have hovering over him, the 33-year-old remained calm, birdied the third and pressed on unfazed.
"I said to myself, `Everyone's going to have one of those around here at some stage during the 72 holes', and that was mine," he said.
"There's no point getting down on yourself and being self-indulgent.
"I just stayed as calm as I could and got on with it."
That calmness translated into six birdies and just one more bogey as he surged up the leaderboard.
Adam Scott began steadily, but an eagle on the par-five 13th also rocketed him up the leaderboard and within touch of the leaders at two under.
The day was also much better for Aaron Baddeley, who signed for a 70 to scrape in at the likely cut mark of one over.
The news wasn't as good for either Robert Allenby or his long-time mate Stuart Appleby.
Needing a par up the last to finish one over and play at the weekend, Allenby made a bogey after hitting his second shot on the 18th long and into a position from which a par four was almost impossible.
And so it proved with a five infuriating the Melbourne golfer who said he had played much better than his 71 looked on paper.
Appleby missed the cut at three over despite three late birdies to close his even par round.
Appleby made three bogeys on the front side, then turned it around with birdies on 13, 14 and 16 to finish his Masters at three over.
Melbourne-based Korean Jin Jeong was plucky for most of his round, but he collapsed with three late bogeys to finish with a 77 to be six over and miss the cut.
Only one amateur made the cut, meaning Japan's Hideki Matsuyama will win the Silver Cup as low amateur regardless of what scores he posts in the final rounds.
Jeong finished fifth of the sixth amateurs, but only two shots out of second place.
