He brings the tiny dog to the surface and tries to free it from the reptile's jaws.
The dog yelps as the man struggles to free it from the gator's grasp, loudly grunting from the strain.
The organization that captured the video says the man and his dog are OK.
And if you're wondering how the unusual scenario was caught on camera, it's because Willbanks was walking Gunner in a pond by his back yard - an area that is shared with the Florida Wildlife Federation and the fSTOP Foundation, which often capture footage of animals like deer.
Meredith Budd, regional policy director for the Florida Wildlife Federation, told CNN that the cameras were placed in areas where residential homes intersect with wild spaces in order to teach residents about the wildlife habitats they live near-in part to help avoid the kinds of conflict that can arise when animals like alligators inhabit shared spaces with people and their pets.
Richard Wilbanks of Estero was one of the residents selected to have a camera in his backyard.
"Dogs are family", another man wrote.
"He just came out like a missile", Wilbanks said.
"My hands were just chewed up", he said.
The puppy seen in the 22-second clip is a 3-month old Cavalier King Charles spaniel called Gunner.
"I never thought an alligator could be that fast". "We don't just want to tolerate wildlife, but, rather, we want to thrive with wildlife on a shared landscape".
"Wildlife is all around us and we are all a part of the same ecosystem", she said. Now, though, Wilbanks is sure to keep Gunner on a leash and away from the water.