Instead of ripping apart his shoulder cannon why didn't Wolverine just take his head off? A very well done video despite the fact they had to downplay Wolverine a lot to give the Predator a chance. Wolverine has many more years of combat experience and can rip sentinels apart with his hands. He needs no weapons because he "is a weapon" himself.
Now if the Predator shot him with a spear gun it might have been more interesting. What about Wolverine versus a Xenomorph? Would it's acid blood melt adamantium? Possibly...
