The driver, Mr Zhang, had gotten out of his car to chat with a friend at the roadside when he saw his car rolling slightly.
He quickly jumped into the driver’s seat of the moving car to avert a potential danger.
In his panicked state, instead of slamming his foot down on the brake, he hit the accelerator and went careening at full speed in reverse.
In the process, he hit a motorbike, sending the rider flying then the car fell backwards into a river.
Fortunately, the river was not very deep so Mr Zhang was able to quickly escape from the water.
The accident happened in Yangzhong City in east China on Saturday.