These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fantastic Science: Koura may be a user of this. While he clearly uses Black Magic (like animating the figurehead on Sinbad's ship), he also seems to use a form of chemical explosive to trap Sinbad in the cave on Lemuria.
Too Dumb to Live: YMMV on this, but Sinbad and his crew trying to sword-fight Kali, a statue made of stone (or metal, it's hard to tell). There is no way that swords could hurt it, and they have to knock it off a ledge to break it, anyway. Why not try to run or draw it out of the enclosed temple?
Uncanny Valley: The centaur's all-too-human screams unnerved some viewers.