For the most part, Rugen is a sadist. Chris [Guest], however, wouldn’t hurt a fly, gentle fellow that he is.

[…]

“You know what, Chris,” I said, “why don’t you just go ahead and give me a slight tap on the head. Just hard enough that I’ll get the feeling and then I think the timing will work.”
Understandbly, Chris was initially reluctant.

[…]

Chris swung the heavy sword down toward my head. However, as fate would have it, it landed just a touch harder than either of us anticipated. And that, folks, was the last thing I remember from that day’s shoot.

—Cary Elwes, As You Wish: Inconceivable Tales from the Making of the Princess Bride