Belfast's British Double Mini-Trampoline champion Ryan Devine missed out on a finals spot at the World Championships as he finished 22nd.
Chasing a top-eight qualification spot in St Petersburg, Devine's score of 68.00 from his two effort was 4.70 outside the mark needed to progress.
The 17-year-old's British team-mate Rhys Gray qualified fifth with a score of 73.500.
Devine won the British title in September in his first senior event.
Russia's Mikhail Zalomin led the qualifiers for Friday's final with a total of 76.300.