Bernd Wiesberger made nine birdies in succession during a sensational second round to move into a one-stroke lead at the midway point of the Maybank Championship.
Marc Warren had carded a 63 to hold a two-shot advantage at the end of the first day, but the Scotsman endured contrasting fortunes on Friday as he shot a three-over 75 to fall back to six under.
After three birdies in his opening 12 holes, Warren - having started at the 10th - was three ahead of the pack. However, three dropped shots on the next four holes and a woeful triple-bogey at the ninth left him six shots off the pace.
As Warren failed to replicate his fine opening-day showing, Wiesberger lit up the course with a tremendous display featuring 11 birdies in all.
His nine straight gains from the seventh to the 15th would have seen him set a European Tour record had preferred lies not been in place. Wiesberger's second blemish of the day came at the 17th, but he duly responded with a closing birdie to move to 12 under.
Nine. Straight. Birdies! pic.twitter.com/1O6G7obBE1-- The European Tour (@EuropeanTour) February 10, 2017
Masters champion Danny Willett also posted a gain at the last to stay within one shot of the Austrian at the end of another strong round as he followed up his first-round 66 with a 67.
Wiesberger said: "I felt a bit beside myself to be honest. I just kept it going, I felt like I was on a good run and I felt comfortable pretty much the whole day after my bogey on four.
"I hit really good shots and I just felt calm out there. It felt kind of natural, I hit pretty good shots and really only holed two long ones which were the last birdie of the nine [in a row] on 15 and about a 20-footer on 11."
Mike Lorenzo-Vera and David Lipsky are three shots behind on nine under, one ahead of Kim Kyung-tae and Shubhankar Sharma with a group of seven players five strokes adrift.
Charl Schwartzel, Ross Fisher and Kiradech Aphibarnrat all missed the cut, while Chris Paisley was among those to sneak into the weekend in searing heat.