Good dog? Sort of.
According to the description of the video above, which was posted to America's Funniest Home Videos, this trained rescue dog got a little carried away when it saw a child trying to go for a swim.
The kid, who was in no danger, looks seriously annoyed by the unnecessary rescue, maybe because summer is almost over and there are not many good swim days left.
But when a rescue dog decides playtime is over, playtime is over.