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This is the moment a hapless girlfriend careered head first off her partner's motorbike as she tried to learn to ride it.
Footage taken on a mobile phone shows the woman tumble off the powerful blue vehicle and crash against the floor in a car park .
She writhes on the ground as her boyfriend rushes to help her.
The passerby who filmed the crash called it an "epic failure".
It's understood the collision happened in the US this week.
It is unclear whether the girlfriend needed medical treatment after the impact.