Lee Westwood surged four shots clear at the halfway stage of the European Tour's Malaysian Open on Friday after an eventful second round where Spain's Pablo Larrazabal was forced to dive into a lake to avoid a swarm of hornets. The former world No 1 Englishman took his two-day total to 13-under after a six-under-par 66 and put himself in prime position to end an almost two-year trophy drought. Westwood matched his eight-birdie opening round again on Friday but was pulled back by a double-bogey on the 11th hole at the Kuala Lumpur Golf and Country Club with his tee shot ending in the water. They were three times the size of bees. They were huge and like 30 or 40 of them started to attack me big time Pablo Larrazabal on being attacked by wasps The water proved a haven for Spain's Larrazabal, though, as he encountered the "scariest" moment of his career when he had to dive into a lake after being attacked by wasps on the fifth hole. "I hit my tee shot just right of the bunker and chipped it out quite well," Larrazabal, 30, said. "So I'm walking along and suddenly I felt something on my nose. "I swatted it away and suddenly … they were not bees, they were three times the size of bees. They were huge and like 30 or 40 of them started to attack me big time. "I didn't know what to do. My caddie told me to run, so I start running like a crazy guy, but the hornets were still there, so the other players told me to jump in the lake. "So I ran to the lake, threw my scorecard down, took off my shoes and jumped into the lake. It was the scariest moment of my career, for sure. I've never been so scared." Larrazabal, who was stung around 20 times, returned to the course after a couple of injections and a change of shirt and birdied the par-five hole - his 14th. "The referees and a doctor took me aside and gave me a couple of injections and told me to relax," he said. "After the injections, I felt a lot better and could continue." "It looks like I'll be playing the weekend, so now it will be very, very scary to play that hole. I will play it very quickly."