I loved the action, the fights and chases. The overall basic storyline had several holes.
Major spoiler alert!
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First of all, how did the skull get stolen in the first place? As soon as it was reattached, the being "Comes to life". Why didn't it just leave before or prevent it's head from being stolen in the first place?
Real life alert: I really don't think someone could survive an atomic blast by hiding in a fridge. Even if that somehow protected him, wouldn't the way it fell have killed him? Oh well, thats Hollywood.