The 11-year-old girl posted a video on her Instagram and YouTube channel with a clip of her California spill and an emotional message from her hospital bed.
The video shows Brown flying at the end of a half-pipe while traveling at high speed.
Lying next to a teddy bear and a pink shark in his hospital bed, Brown reassured his fans that, although she was beaten and bruised, she was "excited to come back even stronger and more tough".
"I don't usually post or talk about my falls, because I want people to see the fun in what I'm doing, but it was my worst fall, and I just want everyone to know I'm fine "said Brown. in his hospital video.
"It's okay to fall sometimes. I'm just going to get up and push harder. I know there's a lot going on in the world right now and I want everyone to know that whatever we do, we must do it with love and happiness. "
'Lucky to be alive'
Brown is targeting the Tokyo Games, which have been postponed to 2021 due to the coronavirus pandemic, where the sport will make its Olympic debut.
After suffering skull and wrist and left hand fractures when she fell, she was transported to hospital by helicopter. The British Olympic team did not immediately respond to CNN's request for comment.
Brown's father Stewart said to the BBC that she was "lucky to be alive" after her fall.
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"Sky landed head first on a ramp on his hand," said Brown's father. "When she arrived at the hospital, everyone was afraid for their lives.
"Sky has had the biggest fall it has ever had and is lucky to be alive. Sky remains positive and strong; the entire medical team is shocked to see her positivity."
In describing his video on YouTube, Brown said, "It was my worst fall to date. My helmet and arm saved my life. It won't stop me. I'm going to get gold from Tokyo 2021. Stay strong. Stay positive. "
Brown was born in Miyazaki, Japan. His mother is Japanese, while his father is British.
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