Hard-hitting Chris Hala'ufia flattened a streaker and was then sent off for a brutal attack on Leicester forward Laurence Pearce during Saturday's Aviva Premiership clash. The Tongan number eight, who has been warned in the past over his ill-discipline, halted Pearce in his tracks with a shoulder charge and left him prone on the ground. After studying replays on the big screen, referee Tim Wigglesworth showed Hala'ufia a yellow card and then changed it to red after he had seen him shove Pearce's head into the ground. London Welsh forward Chris Hala'ufia  tackles a streaker during Saturday's Aviva Premiership match . Hala'ufia halted  Laurence Pearce with a shoulder charge and then shoved his head into the turf . Leicester number eight Pearce was left prone on the ground after the challenge by Hala'ufia . Hala'ufia then grabbed Pearce's head and rammed into the turf, earning him a red card . Watch Chris Hala'ufia's brutal assault on Laurence Pearce . The dismissal of Hala'ufia helped Leicester Tigers boost their hopes of a top-four finish with a workmanlike bonus point 38-17 win. Leicester fought back from a shock 10-7 half time deficit to score 31 points in a one sided second half against the relegated Welsh. Captain Ben Youngs scored Leicester's first try in the third minute and five more followed after the interval from Laurence Pearce (two), Sam Harrison, Jamie Gibson, and Tom Youngs. London Welsh's tries came from Koree Britton and Opeti Fonua. Leicester, however, left the field at half time to boos and whistles from a section of the Welford Road crowd who were unhappy with a lethargic, error-strewn performance from their team. It was the first time the Welsh had led at half time in the Premiership this season and, while they did not play well, they fought for everything and scored a well-deserved try in the 38th minute. It came moments after a male streaker had enlivened proceedings by running across the pitch. He was flattened by a flying tackle from Hala'ufia before being escorted from the ground by two stewards . Some were not sure where to look when the streaker ran on to the pitch during the first half . Imposing number eight Hala'ufia took exception to the interruption in play by the naked fan . Hala'ufia decided to take matters into his own hands and help remove the streaker . Whether that proved a distraction to kicker Chris Elder is a moot point but the winger then missed a relatively easy penalty before the Welsh took the lead with a try after a surging run from Hala'ufia. Hala'ufia found hooker Britton who dived under the posts, with replacement Will Robinson adding the conversion. It seemed a lot longer than 35 minutes since Leicester had started the match with a bang, scrum half and captain Ben Youngs sauntering over for an easy try in the fourth minute from a line-out with the Welsh defence having gone missing. Freddie Burns' conversion made it 7-0 and the crowd sat back and probably expected an avalanche of points against a side already relegated, having gained just one bonus point all season and shipped 869 points before this match.. The pitch invader managed to get back to his feet despite the hit from Hala'ufia . The streaker was finally escorted from the ground by two stewards . But the rout never came as Leicester made error after error, particularly at the breakdown, and after Elder had missed a 16th minute penalty he put the visitors on the board with a beauty from a metre inside his own half. The Exiles' lead did not last long because Leicester, probably after a half time rollicking, scored three minutes after the break, No8 Laurence Pearce getting the touchdown after a rolling maul, the decision coming from the TMO. Burns missed the conversion. Pearce got his second seven minutes later, finishing off a lovely outside break by Mathew Tait to make it 17-10. Burns hit a post with the conversion attempt. Things got worse for the Welsh in the 55th minute when Hala'ufia was sent off after he halted Pearce in his tracks with a shoulder charge and left him prone on the ground. After studying replays on the big screen, referee Tim Wigglesworth showed Hala'ufia a yellow card and then changed it to red after he had seen him shove Pearce's head into the ground. The bonus point try came in the 65th minute after a brilliant counter from full-back Niall Morris. Although hauled down just short of the line, replacement scrum half Harrison dummied before stretching over a pile of bodies to get the touchdown which Burns converted. Flanker Gibson got the fifth, his strength taking him over in the right corner, which replacement Tommy Bell converted. With seven minutes left giant replacement Fonua got the Exiles second try from a tap penalty near the line. Robinson converted. Replacement hooker Tom Youngs scored Leicester's sixth with two seconds left. Bell converted.
Chris Hala'ufia flattened a streaker with flying tackle at Leicester . London Welsh forward halted Laurence Pearce with shoulder charge . The number eight then shoved Pearce's head into the ground . Referee sent him off after studying replays on the big screen .