Don't flip off the Labrador.

Labrador retrievers are very friendly and gentle dogs, but if you make an impolite gesture towards them, such as flipping them off, they may feel insulted. They will stop and turn their heads to stare at you, making a low growling sound. Their ears will tilt back, and their eyes will become narrow and sharp. If you continue to make impolite gestures, they may scratch or bite you with their paws. Therefore, it is best not to make impolite gestures towards Labrador retrievers, and to respect their feelings and dignity.