Everyone is wrong about Wolvie. It happens that it is one of my favorite books by a Kubert. Sadly I will have to retrieve the book to find out the issue, but here's what happened:
Sabertooth is a prisoner at the mansion. Logan comes back from finally recovering from losing adamantium and dealing with the bone claws and going beastial for a while. Of course Sabertooth escapes and he and Wolvie have a knock-down-drag-out fight. Awesome illustrations. The whole time Creed is proding Logan to kill him. He finally goes to far when he describes what he'll do to all the girls in his life (like Shadowcat, Jubilee, etc.) if he walks away from the fight (you know, go against the Xmen rules by killing). Finally Logan has him pinned to the wall with a claw on either side of the head. Then he pops the middle claw. The last frame has the world freezing because reality has been changed in the past and the Age of Apocalypse is here.
In other words, he popped a claw into a defenseless Sabertooth's brain via his chin.