SUNSHINE Coast motocross star Jake Moss is angry a freak crash could have ended his twin brother's stellar career.
Jake's brother, Matt Moss, sustained a broken leg, broken ribs, broken wrist and damage to one of his retinas after a crashing into a digger that was driven onto a track during competition in Victoria.
The incident happened during round seven of the MX Nationals series which was held in Shepparton on Sunday.
Astonishing footage, which has been shared extensively on the internet, showed Matt clear a jump before crashing heavily into the digging machine.
Matt and Jake are among the leading riders in the country.
Event director Kevin Williams explained in an interview published on motocross website motoonline.com.au that human error had led to a digger driver driving onto the track.
He said Motorcycling Australia and the Victorian Office of Workplace Health and Safety were involved in investigating what went wrong.
Jake said the severity of his brother's injuries would probably rule him out of Australian Supercross championships series, set to begin in September.
"He's really upset," Jake said.
"This could be a career-ender."
Jake wasn't at Shepparton because he was still recovering from a broken leg of his own.
"I can't handle watching my brother.
"I just get too nervous."
He found out about the crash through his mother.
"As soon as I saw that phone ring I knew something was wrong."
He didn't blame anyone specifically, but was disgusted that it could occur.
"It's the Australian Motocross Championships, not some club day.
"It was an unfortunate accident and someone has got to pay for it."
Jake, who moved to Birtinya about a year-and-a-half ago, hoped to be recovered from his broken leg in time for the supercross series.
"I've got four more weeks until I can start riding."