Koh Ki Seok, 40, was walking on the beachside footpath on Thaweewong Rd with Miss Seo Min Cher, 32, when he was knocked flying by the bike.
While rescue volunteers treated injuries to Mr Koh’s legs, police looked for the culprit.
They did not have to look far. Just down the footpath was a motorbike lying on its side. Police breathalysed the owner, Phichet Pantharat, 41, and found his alcohol level significantly exceeded the legal maximum. He was arrested for driving while drunk and for reckless driving causing injury.