X-Men Vol 2. #103 - Part 4
"Like, Wolverine, do you really think I’m that dim? Your claws are covered with adamantium, they’ll slice through anything. Your bones are laced with the same stuff, makin’ them virtually unbreakable. But that’s no protection at all, from someone who knows anatomy. You want to drop, be my guest. We’ll see how well your healing factor can cope with a blade through the heart… an’ another straight up into your brain."