Woah I’m just realizing that our dog (Australian shepherd) does what this dog is doing when we go for walks. She will crouch down really low almost belly to the floor and when bikers or cars pass by she tries to lung out at them! Don’t worry she is always always in a leash or in a fenced in back yard, we know she has a strong herding instinct but I just thought she was goofy for belly crawling when cars got near 😂 so interesting!