A FORMULA ONE mechanic was knocked to the floor after a pit stop blunder.

Alpine driver Pierre Gasly pulled in for a tyre change 12 laps into the Chinese Grand Prix.

A mechanic was knocked to the floor as Pierre Gasly tried to set off
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A mechanic was knocked to the floor as Pierre Gasly tried to set offCredit: F1TV

The wheel was not screwed on properly and fell off
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The wheel was not screwed on properly and fell offCredit: F1TV

Alpine's mechanic fell to the floor
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Alpine’s mechanic fell to the floorCredit: F1TV
But as the Frenchman went to pull away – disaster struck as one of the wheels was not attached properly.

It led to the tyre coming off the car and hitting one of the mechanics.

The Alpine staff member was knocked to the floor in worrying scenes.

His colleagues rushed to put the wheel back on but the delay saw Gasly stay in the pits for close to 20 seconds.