Bookmaker says he almost 'wet his pants' after accepting staggering $500k bet on Melbourne Cup bolter... which could see him pay out $4m
          
        
        An Australian bookmaker has admitted that he 'nearly wet his pants' after accepting a jaw-dropping $500,000 (£249,000) bet on 7-1 shot Al Riffa at this year's Melbourne Cup.      
      
      
        
          
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          Daily Mail