Snowboarder Ayumu Hirano won gold in the men’s halfpipe at the Beijing Winter Olympics after posting a score of 96.00 in his third run on Friday, while US superstar Shaun White missed out on the podium in his last ever competition. Hirano, who won silver in PyeongChang and Sochi, saved his best for last, overtaking Scotty James’s 92.50 with a breathtaking last run at Genting Snow Park. Australia’s James still achieved a silver, bettering his bronze in PyeongChang. The Beijing bronze went to Switzerland’s Jan Scherrer with a score of 87.25. White, a three-time gold medallist, fell in his final …