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.
Ham and Cheese: Tim Curry as Herkimer Homolka, a "Romanian philanthropist" who is "Travelink de vorld and doink goot!" The book had no equivalent character. Same with Bruce Campbell. And Delroy Lindo. It's like somebody realized what a lame movie they were making out of a great book and said "Hey! Let's get some awesome over-actors to keep people's attention!"
Or they realized they were making a lame movie out of a lame book and tried to spice up the lameness they had to work with.
Ditto Ernie Hudson as Munro; the "Great White Hunter" of the group though he "happens to be black!" So damn cool he almost makes the film worth watching for his performance alone.
Harsher in Hindsight: The scientist character saying that chopping down the rainforest won't change the world's climate. 30 years later and global warming is a thing...
Hilarious in Hindsight: The statement that a 'worldwide network enabling billions of computers to communicate with each other' is theoretically impossible.