Punters jamming Off-Course Betting centres and Jockey Club Telebet lines had wagered $80.4 million on today's Triple Trio at Sha Tin when betting closed last night. With the fourth-highest carry-over in the history of the bet - $52.9 million - going into the pool, the final turnover is expected to top $175 million. The action now switches to Sha Tin and Happy Valley racecourses, where punters on course can place their bets. Windows have been set aside to cater for heavy demand and the normal Saturday crowd at Sha Tin is expected to swell. 'It is a very good meeting anyway with the Gold Cup, and now that the Triple Trio promises to be so big, we are confident there will be a very good turnout,' said Jockey Club spokesman Leo Kwan last night. Betting centres stayed open an extra hour until 8 pm last night and Triple Trio fever saw tens of thousands wager $57.8 million with many still waiting to place bets when the offices closed. The Telebet facility saw a further $22.6 million wagered as punters sought a first dividend which could top $100 million for a $10 bet. This is the first major jackpot of the season, but today's Triple Trio races are tricky and the bet might not be won. The first leg starts at 2.30 pm.