what they did do after shooting him was to prop him in a sitting position on the ground of the garden , take a wooden stake that was one inch wide by one inch thick by four feet long from one of the tomato plants , with a point on the end that went into the soil , tilt the nazis head back , put the pointed end in his mouth , and drive the stake down his throat , through his stomach and intestinal track , out his asshole , and into the grass on which he sat .