Schoolgirl Riley Horner’s life has turned into something from a Hollywood film.

She wakes up every day and thinks it’s June 11, the day she copped an accidental kick to the head by a student crowd-surfing at a dance.

The head knock caused multiple seizures and she now suffers the disorienting trauma of her memory resetting every two hours.

“I’m very confused. I try to think back and I can’t … I have a calendar on my door. I look and it’s September and I’m like, ‘Woah’,” she told local Illinois news outlet, WQAD.

Her conditions remains a medical mystery.

“They tell us there’s nothing medically wrong. They can’t see anything,” her mother Sarah said.

“You can’t see a concussion though on an MRI or a CT scan. There’s no brain bleed, there’s no tumour.”

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Unsurprisingly, it’s dramatically changed her life.

“I’m not making memories and I’m just really scared,” Riley said.

“I will have no recollection of this (interview) come supper time. My mum will say, ‘Oh you were on the news’.”

“They told us that she may just be like this forever. And I am not OK with that,” her mum said.

Mix 102.3 Adelaide