Despite missing out on the finals, Walker has worked his way to 18th in the world.
Walker competed against 50 of the world’s best scooter riders, eventually finishing 18th.
Walker was a late call up for the tournament, only being invited last week, days before the competition began.
Riders from around the world converged on Barcelona, Spain for the world championships on Saturday and Sunday.
Opportunities like these open so many doors for me.
Walker had a score of 42.80 in his first run, but was unable to top it, leaving him out of the top 12 to go through to the final on Sunday.
Walker was not far off, with the 12th place-getter scoring 45.40, a tantalising 2.60 points away.
The whirlwind ride will continue for Walker when he competes in the semi-finals of the Nitro World Games at Salt Lake City, Utah this weekend.
Prior to the world championships Walker reflected on his recent success.
“Opportunities like these open so many doors for me,” he said.
The Nitro World Games will see the worlds best extreme sports athletes converge on Salt Lake City.
Walker will be competing against athletes he said he has “idolised” since he was 14-years-old.