Several cars pulled over in a frantic effort to save the dog in Los Angeles.
When one driver stopped her car, the puppy decided to jump right in.
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"For some reason, he just went right in," she said.
The dog was treated for a minor injury by a vet, who scanned the pup for a microchip, but nothing was found.
In the meantime, the dog is being well taken care of until the rightful owner can be found.