Two jumps for me:
1) bone claws (x-men 25/wolv 75)
2) Origin/James Howlett (I feel like a tool just typing that name!)
Those are good examples given - as are the others'. But yeah, that jpeg America's Captain posted, with Nitro vaporizing his flesh was pretty darn bad and worth spitting on. Even though that whole Azrael Curse thing helped a smidge with the no prize fix.
Here's a neat THE EVOLUTION OF WOLVERINE infographic to jar more memories for more examples.
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