Yeah, he does that alot. When he suddenly hears a sound, like a rabbit in the woods, his ears perk up and he does that. When he hears or sees something he turns deaf and it's hard to get his attention. Thats why he can't go off leash that much because he has a high prey drive. Maybe in a field away from things but when nobody is around I let him off in the backyard and he can make it around the house in 3 seconds. He loves to run!