It's true that dogs are man's best friend, but this dog takes loyalty to a whole new level. The dog owner posted a video of his pup taking heroic action [1] to save him, even though he was safely swimming in shallow water. You can see the dog's adorable look of panic as he sees his owner disappear under the water, assuming he's unable to come back up. The sweetest part? The dog insists on putting the man's hand in his mouth to drag him safely back to shore. We can only hope that our dogs would do the same thing for us, right? While you're here, don't forget to check out more sweet, funny viral videos [2].