Antonio Lascuna set the clubhouse target in the second round of the Maybank Malaysian Open.
Lascuna added a 65 to his opening 70 at Kuala Lumpur Golf and Country Club to finish nine under par, the 43 year old from the Philippines recording eight birdies and one bogey.
While Lascuna shone to take the clubhouse lead, a bizarre incident involving Pablo Larrazábal saw the Spaniard attacked by hornets.
The Abu Dhabi Championship winner recorded a 68 despite being attacked by hornets and diving into a water hazard to escape.
The incident happened on the par five fifth hole - Larrazabal's 14th hole of the day - and after receiving treatment the 30 year old went on to make birdie and another on the seventh to finish two under par.
First round leader Lee Westwood had started his second round with a birdie to move within a shot of Lascuna on eight under par, with fellow Englishman Danny Willett also eight under with one hole to play.
France's Julien Quesne was safely in the clubhouse on seven under par after adding a 69 to his opening 68, while England's Andy Sullivan was seven under with four holes to play after picking up five shots on Friday.
Larrazábal later described the incident on Twitter, writing: "Amazing what happened today. I have been attacked by 40 bees at the 5th hole. Never been so scared on a golf course. I'm better."
Back on the course, Willett parred his final hole to complete a 66 and finish eight under, but Westwood was showing no signs of easing up in pursuit of his 13th victory in Asia and 41st of his career.
The 40 year old chipped to within inches of the hole to set up a birdie on the third and two-putted the par five fifth for another to move to ten under par, one ahead of Lascuna and Ryder Cup team-mate Nicolas Colsaerts.
Colsaerts had opened his second round with two pars but then rolled in a hat-trick of birdies from the third.
Westwood was inches away from holing his approach to the sixth and another superb iron shot set up his fifth birdie of the day from short range on the ninth.
That meant the former World Number One had covered the front nine in 31 for the second day in succession and at 12 under par he enjoyed a two shot lead over Colsaerts.
Colsaerts had birdied the seventh to be out in 32 as he chased his first European Tour title since the Volvo World Match Play Championship in 2012.