Dog
I had a black Lab I did an air show with. J-3 Cub, I was the farmer in the back seat. When the helper hand propped the engine, I would whistle and the dog would run from the crowd behind the airplane and jump in the front seat. I would takeoff with the door open and turn away from the crowd and shut the door. The dog did great, but he didn’t like negative Gs at all. I owned a FBO at the time and that dog learned to wait until the passengers left before he begged for a donut. Good pheasant dog also.