>>16285444momentum and the direction of it.
Canadian destroy is a forward momentum + gravity, so while it can strain the neck among many other freak mishaps, the probability is on your side as you lower body mass, which is now feet towards the ceiling, is moving forward and pivoting on your torso on the impact and forcing you to take the impact rolling and with a chin tuck. It's very much like one man taking a messy backwards roll with straight legs.
You'll notice that the Piledriver Ko gave to Randy was cleverly modified so it was more of a canadian destroyer roll than a pile driver
An actually rested and primed piledrive, talking about one that Undertaker gives for best example with the wait before drop, relieves the giver having and maintaining full control bearing the full weight of the opponent and their own on their legs. Say for example on Canadian you taking a 200 pound man and him flipping on his own neck, it's double that on a pile driver. Once the descent starts there is no stopping until that 400 pounds or so is hitting on just your knees, and that's not even calculation acceleration and G, gravity. That's two peoples weight on your neck. If any part of this move goes wrong, like what happened with Owen and Stone Cold, all that force and impact is primarily hitting the neck and traveling up the spine and your chance of getting crippled is way higher.
