When i was a kid we caught a big softshell, and dad thought he would clean it, even though he has never done it.
Some old timers told him to cut a slot it in near its back leg and stick a water hose in it. They also said he could do the same with a air nozzle. So what does dad do? He tries both. First the water hose, it didn't do the job. Then he used the air nozzle. It stretched the turtle's neck out about 18". Dad then grabbed his axe. ( DO NOT ATTEMPT TO CHOP A TURTLE'S HEAD OFF IF IT IS UNDER AIR PRESSURE!!)
I can still remember dads white shirt ,glasses,hat, the barn walls, and myself covered in red slime!!
My brother didn't fair so well , because he was standing right behind the turtle. Everything the turtle ate for lunch the day before hit him in the chest!
To this day he will not eat turtle....