BMX champ Sam Willoughby stands for first time since breaking his neck

A video shared to Instagram Thursday shows Australian BMX star Sam Willoughby standing up for the first time since he broke his neck in a training accident last September:

The video — which begins with a cameo appearance by the 25-year-old Willloughby’s dog Mila — shows the two-time UCI BMX world champion and the 2012 Olympic silver medalist standing with minor assistance from his trainer at the Neuro Ex rehab facility in Oceanside, California.

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The short clip represents a major milestone for Willoughby, who has been in a wheelchair since fracturing his C6 vertebrae in the accident.

As recently as October, when he was interviewed on “60 Minutes,” Willoughby had limited mobility in his arms, and according to his Road2Recovery donations page, he was released from Craig Hospital in Denver to his home in San Diego on New Year’s Eve.