The three men were in a boat and just happened to come across a car that was sinking. 

The floods that have ravaged Louisiana are, according to the Governor, "historic." So far, there have been three flood-related fatalities. There was almost a fourth when this video was taken.

The men floated up to the car, which was sinking fast. One of the men jumped out of the boat and grabbed the woman's arm from the drivers side window. As soon as she catches her breath, she tells the man that her dog is in the car.

You actually hear him for a second say that he can't "get your dog." And then, in one last heroic attempt, he goes underwater and rescues the pooch.

This is absolutely the definition of heroism.